diff --git a/core/ui/modules/dnd.js b/core/ui/modules/dnd.js
index fb1ca9e..52b8249 100644
--- a/core/ui/modules/dnd.js
+++ b/core/ui/modules/dnd.js
@@ -35,6 +35,18 @@ let lastHighlightedCell = null;
 
 function onDragOver(e) {
     e.preventDefault();
+
+    // Don't offer a drop target while a grid reload is in flight: the cells under
+    // the cursor are stale and about to be replaced. Leave dropEffect unset so the
+    // cursor shows "no-drop", and clear any lingering highlight.
+    if (state.isGridReloading) {
+        if (lastHighlightedCell) {
+            lastHighlightedCell.classList.remove('drag-over');
+            lastHighlightedCell = null;
+        }
+        return;
+    }
+
     e.dataTransfer.dropEffect = 'copy';
 
     const cell = e.target.closest('.data-cell');
@@ -64,6 +76,11 @@ async function onDrop(e) {
         lastHighlightedCell = null;
     }
 
+    // Ignore drops while a grid reload is in flight: the targeted cell belongs to
+    // the stale result set about to be replaced, so the upload would land on the
+    // wrong row/column once the new data renders.
+    if (state.isGridReloading) return;
+
     const cell = e.target.closest('.data-cell');
     if (!cell || cell.classList.contains('row-number')) {
         return;
diff --git a/core/ui/modules/grid-data.js b/core/ui/modules/grid-data.js
index 72449d8..bfe1c46 100644
--- a/core/ui/modules/grid-data.js
+++ b/core/ui/modules/grid-data.js
@@ -38,22 +38,62 @@ export async function loadTableColumns() {
     }
 }
 
+// Monotonic token identifying the most recent loadTableData() call. Concurrent
+// loads (e.g. a slow fetch followed by a filter/sort/page change or a table
+// switch, triggered via toolbar controls the grid guard doesn't cover) compare
+// this after each await and bail if a newer load has started — so a superseded
+// request never writes state, renders stale rows, shows a stale error, or clears
+// the loading flag out from under the in-flight one.
+let activeLoadToken = 0;
+
 export async function loadTableData(showSpinner = true, saveScrollPosition = true) {
     if (!state.selectedTable) return;
 
-    const container = document.getElementById('gridContainer');
+    const loadToken = ++activeLoadToken;
+    // Snapshot the target table/type for the whole request so an in-flight load
+    // can't pair this table's columns with a table the user switched to mid-fetch
+    // (which would SELECT the old columns against the new table and error out).
+    const requestedTable = state.selectedTable;
+    const requestedTableType = state.selectedTableType;
+    // This load is superseded if a newer load has started (token bumped) OR the
+    // user has navigated to a different table. The selection check matters because
+    // a table switch changes state.selectedTable synchronously but only starts its
+    // own load (bumping the token) after awaiting loadTableColumns(); during that
+    // gap the old load still owns the token, so a token-only check would let it
+    // render the old table's rows under the new selection and clear the flag.
+    const isSuperseded = () => loadToken !== activeLoadToken || requestedTable !== state.selectedTable;
 
-    // Only capture scroll position if the grid is currently visible (not loading/error state)
-    // This prevents overwriting the saved position with 0 when reloading data while a spinner is shown.
-    if (saveScrollPosition && container && container.querySelector('.data-grid')) {
+    const container = document.getElementById('gridContainer');
+    // Whether a data grid is currently rendered (vs. a spinner/error/empty state),
+    // AND whether it belongs to the table we're loading. The renderedTable check is
+    // what separates a same-table refetch (filter/sort/page — keep the grid, no
+    // flicker) from a table switch, where the previous table's grid is still in the
+    // DOM and must not be left on screen. Cached once instead of re-querying below.
+    const hasRenderedGrid = !!(container && container.querySelector('.data-grid'));
+    const isSameTableGrid = hasRenderedGrid && state.renderedTable === state.selectedTable;
+
+    // Only capture scroll position if the current table's grid is visible (not a
+    // loading/error state, and not a different table's grid mid-switch). This
+    // prevents overwriting the saved position with 0 while a spinner is shown.
+    if (saveScrollPosition && isSameTableGrid) {
         state.scrollPosition.left = container.scrollLeft;
         state.scrollPosition.top = container.scrollTop;
     }
 
     if (showSpinner) {
         state.isLoadingData = true;
-        showLoading();
+        // Dedicated guard the grid handlers + global delete/select-all shortcuts
+        // key on. Separate from isLoadingData (also set by BLOB uploads in dnd.js)
+        // so the two can't clear each other; released by the latest load below.
+        state.isGridReloading = true;
+        // Keep the existing grid visible during a same-table refetch (prevents
+        // flicker); show the spinner on a true first load or a table switch, where
+        // nothing valid for this table is on screen yet.
+        if (!isSameTableGrid) {
+            showLoading();
+        }
     }
+
     updateToolbarButtons();
 
     try {
@@ -66,14 +106,19 @@ export async function loadTableData(showSpinner = true, saveScrollPosition = tru
             }
         }
 
+        // Column names are needed both for the global-filter count and the data query.
+        const columnNames = state.tableColumns.map(c => c.name);
+
         const countOptions = {
             filters,
             globalFilter: state.filterQuery,
-            columns: state.tableColumns.map(c => c.name) // Needed for global filter
+            columns: columnNames // Needed for global filter
         };
 
         // Get total count
-        state.totalRecordCount = await backendApi.fetchTableCount(state.selectedTable, countOptions);
+        const totalRecordCount = await backendApi.fetchTableCount(requestedTable, countOptions);
+        if (isSuperseded()) return; // a newer load started, or the user switched tables
+        state.totalRecordCount = totalRecordCount;
         state.totalPageCount = Math.max(1, Math.ceil(state.totalRecordCount / state.rowsPerPage));
 
         if (state.currentPageIndex >= state.totalPageCount) {
@@ -81,8 +126,7 @@ export async function loadTableData(showSpinner = true, saveScrollPosition = tru
         }
 
         // Get data
-        const isTable = state.selectedTableType === 'table';
-        const columnNames = state.tableColumns.map(c => c.name);
+        const isTable = requestedTableType === 'table';
 
         // For tables, we need to explicitly request the 'rowid' column to handle row identification.
         // The frontend expects rowid at index 0 for tables (see `getRowId` and `getRowDataOffset`).
@@ -99,15 +143,20 @@ export async function loadTableData(showSpinner = true, saveScrollPosition = tru
             globalFilter: state.filterQuery
         };
 
-        const dataResult = await backendApi.fetchTableData(state.selectedTable, queryOptions);
+        const dataResult = await backendApi.fetchTableData(requestedTable, queryOptions);
+        if (isSuperseded()) return; // superseded (newer load or table switch) during the fetch
 
         state.gridData = dataResult.rows || [];
 
-        // If not showing spinner (background refresh), capture the current scroll position
-        // right before rendering. This ensures we use the latest scroll position,
-        // which covers cases where the user scrolled during fetch or if an edit operation
-        // updated the view (and restored scroll) while the fetch was pending.
-        if (!showSpinner && container && container.querySelector('.data-grid')) {
+        // When preserving scroll, re-capture the latest position right before
+        // rendering. Covers the user scrolling during the fetch — including a
+        // flicker-free refetch where the spinner was suppressed and the grid stayed
+        // interactive — and edit operations that restored scroll while the fetch was
+        // pending. Gated on saveScrollPosition (not !showSpinner) so callers that
+        // intentionally reset scroll (page change, table switch) aren't clobbered.
+        // Re-check the DOM here (not the cached flag): this runs after the await,
+        // so the rendered state may differ from when the function started.
+        if (saveScrollPosition && container && container.querySelector('.data-grid')) {
             state.scrollPosition.left = container.scrollLeft;
             state.scrollPosition.top = container.scrollTop;
         }
@@ -119,6 +168,9 @@ export async function loadTableData(showSpinner = true, saveScrollPosition = tru
             // updateCellDom in edit.js handles the visual update of the modified cell.
         } else {
             renderDataGrid(state.scrollPosition.top, state.scrollPosition.left);
+            // The on-screen grid now reflects this table; remember it so the next
+            // load can distinguish a same-table refetch from a table switch.
+            state.renderedTable = requestedTable;
         }
 
         if (container) {
@@ -131,11 +183,23 @@ export async function loadTableData(showSpinner = true, saveScrollPosition = tru
 
     } catch (err) {
         console.error('Error loading data:', err);
-        updateStatus(`Error: ${err.message}`);
-        showErrorState(err.message);
+        // Don't let a superseded load's error replace the current table's view.
+        if (!isSuperseded()) {
+            updateStatus(`Error: ${err.message}`);
+            showErrorState(err.message);
+        }
     } finally {
+        // isLoadingData keeps its original lifecycle. It is also set by BLOB uploads
+        // (dnd.js), so a superseded or no-spinner load must NOT clear it — only the
+        // spinner load that set it does, mirroring the pre-change behavior.
         if (showSpinner) {
             state.isLoadingData = false;
         }
+        // isGridReloading is owned solely here: the latest (non-superseded) load
+        // releases the grid-interaction guard once it settles, regardless of
+        // showSpinner. A superseded load leaves it set for the newer request to clear.
+        if (!isSuperseded()) {
+            state.isGridReloading = false;
+        }
     }
 }
diff --git a/core/ui/modules/grid-events.js b/core/ui/modules/grid-events.js
index e1140e5..d7c0b1a 100644
--- a/core/ui/modules/grid-events.js
+++ b/core/ui/modules/grid-events.js
@@ -52,6 +52,9 @@ function handleMousedown(event) {
 }
 
 function handleKeydown(event) {
+    // Ignore filter Enter while a load is in flight: acting now would queue a
+    // concurrent reload and operate against the stale, soon-to-be-replaced grid.
+    if (state.isGridReloading) return;
     if (event.target.classList.contains('column-filter')) {
         const colName = event.target.dataset.column;
         if (colName) onColumnFilterKeydown(event, colName);
@@ -59,6 +62,11 @@ function handleKeydown(event) {
 }
 
 function handleClick(event) {
+    // Block grid selection/sort/filter/pin clicks while a load is in flight. The
+    // flicker fix keeps the previous grid visible during a same-table refetch, so
+    // without this guard a click on the stale row numbers or cells could select
+    // (and then delete) rows from the old result set before the new data arrives.
+    if (state.isGridReloading) return;
     const target = event.target;
     if (target.closest('.grid-header')) {
         handleHeaderClick(event, target);
@@ -169,6 +177,8 @@ function handleBodyClick(event, target) {
 }
 
 function handleDoubleClick(event) {
+    // Don't open a cell editor on stale cells while a refetch is in flight.
+    if (state.isGridReloading) return;
     const cellEl = event.target.closest('.data-cell');
     if (cellEl && !cellEl.classList.contains('row-number')) {
         const rowIdx = parseInt(cellEl.dataset.rowidx, 10);
@@ -192,6 +202,13 @@ function handleMouseover(event) {
 }
 
 function handleScroll(event) {
+    // Ignore scroll while a load is in flight. The flicker fix keeps the grid
+    // mounted and scrollable during a refetch; without this, scrolling the old
+    // page during a page change (which reset scrollPosition to {0,0}) would
+    // overwrite the reset and reopen the new page at a stale offset. Same-table
+    // filter/sort refetches still preserve scroll via the post-await re-capture
+    // in loadTableData, which reads the live DOM position directly.
+    if (state.isGridReloading) return;
     const container = event.currentTarget;
     state.scrollPosition.left = container.scrollLeft;
     state.scrollPosition.top = container.scrollTop;
diff --git a/core/ui/modules/state.js b/core/ui/modules/state.js
index 29693ef..0aee203 100644
--- a/core/ui/modules/state.js
+++ b/core/ui/modules/state.js
@@ -7,6 +7,10 @@ export const state = {
     isDbConnected: false,
     selectedTable: null,
     selectedTableType: 'table',
+    // Name of the table whose grid is currently rendered on screen. Lets
+    // loadTableData tell a same-table refetch (keep the grid, no flicker) apart
+    // from a table switch (show the spinner instead of the previous table's rows).
+    renderedTable: null,
     currentPageIndex: 0,
     rowsPerPage: 500,
     totalRecordCount: 0,
@@ -24,6 +28,12 @@ export const state = {
     activeCellInput: null,
     isSavingCell: false,
     isLoadingData: false,
+    // Dedicated guard for "a grid data reload is in flight", owned solely by
+    // loadTableData. Kept separate from isLoadingData (which BLOB uploads also set)
+    // so the grid-interaction guards can't be cleared by an unrelated upload. The
+    // grid event handlers and the global delete/select-all shortcuts key on this to
+    // avoid acting on rows that are about to be replaced.
+    isGridReloading: false,
     lastDoubleClickTime: 0,
     isTransitioningEdit: false,
     transitionLockTimeout: null,
diff --git a/core/ui/viewer.html b/core/ui/viewer.html
index 4a45d4a..55a82b6 100644
--- a/core/ui/viewer.html
+++ b/core/ui/viewer.html
@@ -364,7 +364,7 @@
     </div>
 
     <script nonce="<!--NONCE-->">
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n=Array.from(e||[]);if(n.length===0)return"";if(n.length>1)return"(mixed values)";let o=n[0];return o===null?"NULL":o instanceof Uint8Array?"[BLOB]":String(o)}function He(e,n,o){let l=[];for(let a of e){let s=n.get(a.colIdx);if(!s)continue;let i=s.dataset||{},r=i.isnull==="true",c=i.ispatch==="true",d=s.value;if(d===""&&!r)continue;let m=o&&o[a.colIdx];if(!m)continue;let y=d,f="set";if(r)y=null;else if(c)f="json_patch";else{let p=(m.type||"").toUpperCase();(p==="INTEGER"||p==="REAL"||p==="NUMERIC")&&!isNaN(Number(d))&&d.trim()!==""&&(y=Number(d))}l.push({rowId:a.rowId,column:m.name,value:y,originalValue:a.value,operation:f,rowIdx:a.rowIdx,colIdx:a.colIdx})}return l}function Je(){let e=document.getElementById("sidebarPanel");if(!e)return;let n=document.getElementById("sidebarFilterInput");n&&n.addEventListener("input",()=>{t.sidebarFilter=n.value,Y()}),e.addEventListener("click",o=>{let l=o.target;if(l.closest("#btnOpenSettings")){_e();return}if(l.closest("#btnOpenCreateTable")){o.stopPropagation(),Ve();return}if(l.closest("#btnReload")){an();return}if(l.closest("#btnApplyBatchUpdate")){en();return}let a=l.closest(".list-item");if(a){let c=a.dataset.name,d=a.dataset.type;if(c&&d){ln(c,d);return}}let s=l.closest(".section-title");if(s){if(l.closest(".icon-button")||s.id==="btnOpenSettings")return;let c=s.dataset.section;c&&on(c)}let i=l.closest(".btn-batch-null");if(i){let c=i.closest(".batch-field");if(c){let d=parseInt(c.dataset.colidx,10);tn(d)}return}let r=l.closest(".btn-batch-patch");if(r){let c=r.closest(".batch-field");if(c){let d=parseInt(c.dataset.colidx,10);nn(d,r)}return}})}async function V(){if(t.isDbConnected)try{let e=await C.fetchSchema();t.schemaCache.tables=(e.tables||[]).map(n=>({name:n.identifier})),t.schemaCache.views=(e.views||[]).map(n=>({name:n.identifier})),t.schemaCache.indexes=(e.indexes||[]).map(n=>({name:n.identifier,table:n.parentTable})),Y()}catch(e){console.error("Error loading schema:",e),u("Error loading schema")}}function be(e,n){return n?e.filter(o=>o.name.toLowerCase().includes(n)):e}function we(e,n,o,l){let a=document.getElementById(e);a&&(a.textContent=l?`${n}/${o}`:o)}function Ge(e,n,o,l,a){let s=document.getElementById(e);if(!s)return;if(s.replaceChildren(),n.length===0){let r=document.createElement("li");r.className="list-item",r.style.opacity="0.5",r.textContent=a,s.appendChild(r);return}let i=document.createDocumentFragment();n.forEach(r=>{let c=document.createElement("li");c.className="list-item",t.selectedTable===r.name&&t.selectedTableType===o&&c.classList.add("selected"),c.dataset.name=r.name,o&&(c.dataset.type=o),c.title=r.name;let d=document.createElement("span");d.className=`item-icon codicon ${l}`,c.appendChild(d);let m=document.createElement("span");m.className="item-name",m.textContent=r.name,c.appendChild(m),i.appendChild(c)}),s.appendChild(i)}function Zt(e,n,o){let l=document.getElementById(e);if(!l)return;if(l.replaceChildren(),n.length===0){let s=document.createElement("li");s.className="list-item",s.style.opacity="0.5",s.textContent=o,l.appendChild(s);return}let a=document.createDocumentFragment();n.forEach(s=>{let i=document.createElement("li");i.className="list-item",i.title=`${s.name} on ${s.table}`;let r=document.createElement("span");r.className="item-icon codicon codicon-list-selection",i.appendChild(r);let c=document.createElement("div");c.className="item-content";let d=document.createElement("span");d.className="item-name",d.textContent=s.name,c.appendChild(d);let m=document.createElement("span");m.className="item-detail",m.textContent=s.table,c.appendChild(m),i.appendChild(c),a.appendChild(i)}),l.appendChild(a)}function Y(){let e=t.sidebarFilter.toLowerCase(),n=e.length>0,o=be(t.schemaCache.tables,e),l=be(t.schemaCache.views,e),a=be(t.schemaCache.indexes,e);we("tablesBadge",o.length,t.schemaCache.tables.length,n),we("viewsBadge",l.length,t.schemaCache.views.length,n),we("indexesBadge",a.length,t.schemaCache.indexes.length,n),Ge("tablesList",o,"table","codicon-table",e?"No matching tables":"No tables"),Ge("viewsList",l,"view","codicon-eye",e?"No matching views":"No views"),Zt("indexesList",a,e?"No matching indexes":"No indexes")}function j(){let e=document.getElementById("batchUpdateSectionTitle"),n=document.getElementById("batchUpdateList"),o=document.getElementById("batchUpdateCount"),l=document.getElementById("batchUpdateFields");if(!e||!n||!o||!l)return;let a=t.selectedCells.length;if(a===0){e.classList.add("hidden"),n.classList.add("hidden");return}e.classList.remove("hidden"),n.classList.remove("hidden"),e.classList.remove("collapsed"),o.textContent=a;let s=qe(t.selectedCells,t.tableColumns);l.replaceChildren();let i=document.createDocumentFragment();for(let[r,c]of s){let d=Ke(c.values),m=document.createElement("div");m.className="form-field batch-field",m.dataset.colidx=r,m.style.marginBottom="8px";let y=document.createElement("label");y.style.fontSize="11px",y.style.color="var(--text-secondary)";let f=document.createTextNode(c.name+" ");y.appendChild(f);let p=document.createElement("span");p.style.opacity="0.7",p.textContent=c.type||"",y.appendChild(p),m.appendChild(y);let g=document.createElement("div");g.style.display="flex",g.style.gap="4px";let b=document.createElement("input");b.type="text",b.className="batch-input",b.placeholder=d,b.dataset.colidx=r,b.style.flex="1",b.style.minWidth="0",g.appendChild(b);let I=document.createElement("button");I.className="btn-secondary btn-batch-null",I.style.padding="2px 6px",I.title="Set to NULL",I.textContent="NULL",g.appendChild(I);let h=document.createElement("button");h.className="btn-secondary btn-batch-patch",h.style.padding="2px 6px",h.title="JSON Patch",h.textContent="{}",g.appendChild(h),m.appendChild(g),i.appendChild(m)}l.appendChild(i)}async function en(){if(t.selectedCells.length===0)return;let e=document.querySelectorAll(".batch-input"),n=new Map;for(let l of e){let a=parseInt(l.dataset.colidx,10);if(n.set(a,l),l.dataset.ispatch==="true")try{JSON.parse(l.value)}catch{let i=t.tableColumns[a];u(`Invalid JSON for patch in ${i?.name??`column ${a}`}`);return}}let o=He(t.selectedCells,n,t.tableColumns);if(o.length===0){u("No values entered for batch update");return}try{u(`Updating ${o.length} cells...`);let l=`Batch update ${o.length} 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o=document.querySelector(`.batch-input[data-colidx="${e}"]`);o&&(o.dataset.ispatch==="true"?(o.dataset.ispatch="false",o.placeholder="(mixed values)",n.style.background="",n.style.color=""):(o.dataset.ispatch="true",o.dataset.isnull="false",o.placeholder='JSON Patch (e.g. {"a": 1})',o.style.fontStyle="normal",n.style.background="var(--accent-color)",n.style.color="white"))}function on(e){let n=document.getElementById(`${e}List`),o=document.querySelector(`.section-title[data-section="${e}"]`);n&&o&&(n.classList.toggle("hidden"),o.classList.toggle("collapsed"))}async function ln(e,n){t.selectedTable=e,t.selectedTableType=n,t.currentPageIndex=0,t.sortedColumn=null,t.sortAscending=!0,t.filterQuery="",t.columnFilters={},t.selectedRowIds.clear(),t.selectedCells=[],t.lastSelectedCell=null,t.selectedColumns.clear(),t.pinnedColumns.clear(),t.pinnedRowIds.clear(),t.columnWidths={},t.scrollPosition={top:0,left:0},Y();let o=document.getElementById("tableNameLabel");o&&(o.textContent=e);let l=document.getElementById("filterInput");l&&(l.value=""),await z(),await v(!0,!1),F()}async function an(){if(t.isDbConnected)try{u("Reloading..."),await C.refreshFile(),await V(),t.selectedTable&&(await z(),await v()),u("Reloaded")}catch(e){console.error("Reload failed:",e),u(`Reload failed: ${e.message}`)}}var Q=new Set,Z=new Set;function Xe(){Q.clear(),t.selectedCells.length>0&&t.selectedCells.forEach(e=>{Q.add(`cell-${e.rowIdx}-${e.colIdx}`)}),Z.clear(),t.selectedRowIds.size>0&&document.querySelectorAll(".data-row.selected").forEach(n=>{n.id&&Z.add(n.id)})}function M(){let e=new Set;for(let o of t.selectedCells)e.add(`cell-${o.rowIdx}-${o.colIdx}`);for(let o of Q)if(!e.has(o)){let l=document.getElementById(o);l&&l.classList.remove("cell-selected")}for(let o of e)if(!Q.has(o)){let l=document.getElementById(o);l&&l.classList.add("cell-selected")}Q=e;let n=new Set;for(let o=0;o<t.gridData.length;o++){let l=T(t.gridData[o],o);(t.selectedRowIds.has(l)||typeof l!="string"&&t.selectedRowIds.has(String(l)))&&n.add(`row-${o}`)}for(let o of Z)if(!n.has(o)){let l=document.getElementById(o);l&&l.classList.remove("selected")}for(let o of n)if(!Z.has(o)){let l=document.getElementById(o);l&&l.classList.add("selected")}Z=n,document.querySelectorAll(".header-cell.column-selected").forEach(o=>o.classList.remove("column-selected")),t.selectedColumns.size>0&&t.selectedColumns.forEach(o=>{let l=CSS.escape(o),a=document.querySelector(`.header-cell[data-column="${l}"]`);a&&a.classList.add("column-selected")})}function se(){t.selectedCells=[],t.selectedRowIds.clear(),t.selectedColumns.clear(),t.lastSelectedCell=null,M(),L(),j()}function sn(){let e=document.createElement("div");return e.className="empty-view",e.innerHTML=`
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         <span class="empty-title">No data</span>
         <span class="empty-desc">This table is empty</span>
-    `,e}function sn(e,n,o){let l=document.createElement("thead");l.className="grid-header";let a=document.createElement("tr"),s=document.createElement("th");s.className="header-cell row-number-header",Object.assign(s.style,{width:`${e}px`,minWidth:`${e}px`,maxWidth:`${e}px`,position:"sticky",left:"0",top:"0",zIndex:"11",background:"var(--bg-secondary)"}),s.title="Click to select all rows",s.innerHTML='<div class="header-content"><div class="header-top header-top-center">#</div></div>',a.appendChild(s);for(let i of n){let r=t.sortedColumn===i.name,d=t.pinnedColumns.has(i.name),c=t.selectedColumns.has(i.name),m=t.columnWidths[i.name]||120,h=t.columnFilters[i.name]||"",f=document.createElement("th");f.className=`header-cell ${d?"pinned":""} ${c?"column-selected":""}`,Object.assign(f.style,{width:`${m}px`,minWidth:`${m}px`,maxWidth:`${m}px`}),d&&(f.style.position="sticky",f.style.left=`${o.get(i.name)}px`),f.dataset.column=i.name;let p=X(i.name),g=X(h),w=r?`<span class="sort-indicator">${t.sortAscending?"\u25B2":"\u25BC"}</span>`:"",v=i.isPrimaryKey?'<span class="key-icon codicon codicon-key" title="Primary Key"></span>':"",x=d?"pinned":"",C=d?"Unpin column":"Pin column";f.innerHTML=`
+    `,e}function rn(e,n,o){let l=document.createElement("thead");l.className="grid-header";let a=document.createElement("tr"),s=document.createElement("th");s.className="header-cell row-number-header",Object.assign(s.style,{width:`${e}px`,minWidth:`${e}px`,maxWidth:`${e}px`,position:"sticky",left:"0",top:"0",zIndex:"11",background:"var(--bg-secondary)"}),s.title="Click to select all rows",s.innerHTML='<div class="header-content"><div class="header-top header-top-center">#</div></div>',a.appendChild(s);for(let i of n){let r=t.sortedColumn===i.name,c=t.pinnedColumns.has(i.name),d=t.selectedColumns.has(i.name),m=t.columnWidths[i.name]||120,y=t.columnFilters[i.name]||"",f=document.createElement("th");f.className=`header-cell ${c?"pinned":""} ${d?"column-selected":""}`,Object.assign(f.style,{width:`${m}px`,minWidth:`${m}px`,maxWidth:`${m}px`}),c&&(f.style.position="sticky",f.style.left=`${o.get(i.name)}px`),f.dataset.column=i.name;let p=X(i.name),g=X(y),b=r?`<span class="sort-indicator">${t.sortAscending?"\u25B2":"\u25BC"}</span>`:"",I=i.isPrimaryKey?'<span class="key-icon codicon codicon-key" title="Primary Key"></span>':"",h=c?"pinned":"",x=c?"Unpin column":"Pin column";f.innerHTML=`
             <div class="header-content">
                 <div class="header-top">
-                    ${v}<span class="header-text">${p}${w}</span>
+                    ${I}<span class="header-text">${p}${b}</span>
                     <span class="select-column-icon codicon codicon-selection" title="Select entire column"></span>
-                    <span class="pin-icon codicon codicon-pin ${x}" title="${C}"></span>
+                    <span class="pin-icon codicon codicon-pin ${h}" title="${x}"></span>
                 </div>
                 <div class="header-bottom">
                     <input type="text" class="column-filter" data-column="${p}" value="${g}" placeholder="Filter...">
@@ -398,17 +398,17 @@
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             </div>
             <div class="resize-handle"></div>
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w)t.pinnedColumns.has(b.name)&&(v.set(b.name,x),x+=t.columnWidths[b.name]||120);let C=new Map;t.tableColumns.forEach((b,N)=>C.set(b.name,N));let k=sn(i,w,v);g.appendChild(k);let L=rn(w,C,v,i,52,26,p,f);g.appendChild(L),r.appendChild(g),r.scrollLeft=m,r.scrollTop=h,Xe()}function Ye(){document.getElementById("pageIndicator").textContent=`${t.currentPageIndex+1} / ${t.totalPageCount}`,document.getElementById("btnFirst").disabled=t.currentPageIndex===0,document.getElementById("btnPrev").disabled=t.currentPageIndex===0,document.getElementById("btnNext").disabled=t.currentPageIndex>=t.totalPageCount-1,document.getElementById("btnLast").disabled=t.currentPageIndex>=t.totalPageCount-1}async function z(){if(t.selectedTable)try{let e=await y.getTableInfo(t.selectedTable);t.tableColumns=e.map(o=>({cid:o.ordinal,name:o.identifier,type:o.declaredType,notnull:o.isRequired,dflt_value:o.defaultExpression,isPrimaryKey:o.primaryKeyPosition>0})).sort((o,l)=>o.cid-l.cid);let n=new 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s=t.selectedTableType==="table",i=t.tableColumns.map(m=>m.name),d={columns:s?["rowid",...i]:i,orderBy:t.sortedColumn,orderDir:t.sortAscending?"ASC":"DESC",limit:t.rowsPerPage,offset:t.currentPageIndex*t.rowsPerPage,filters:l,globalFilter:t.filterQuery},c=await y.fetchTableData(t.selectedTable,d);t.gridData=c.rows||[],!e&&o&&o.querySelector(".data-grid")&&(t.scrollPosition.left=o.scrollLeft,t.scrollPosition.top=o.scrollTop),!e&&t.editingCellInfo||_(t.scrollPosition.top,t.scrollPosition.left),o&&(o.scrollLeft=t.scrollPosition.left,o.scrollTop=t.scrollPosition.top),Ye(),u(`${t.totalRecordCount} records`)}catch(l){console.error("Error loading data:",l),u(`Error: ${l.message}`),le(l.message)}finally{e&&(t.isLoadingData=!1)}}var 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     <!--BODY-->
diff --git a/core/ui/viewer.js b/core/ui/viewer.js
index bf4c59d..6a3a56c 100644
--- a/core/ui/viewer.js
+++ b/core/ui/viewer.js
@@ -186,7 +186,10 @@ function setupGlobalShortcuts() {
 
         // Cmd+A / Ctrl+A
         if ((event.metaKey || event.ctrlKey) && event.key === 'a') {
-            if (state.editingCellInfo || document.activeElement.tagName === 'INPUT' || document.activeElement.tagName === 'TEXTAREA') return;
+            // Bail during a grid reload: selecting "all" would capture row ids from
+            // the stale, about-to-be-replaced result set. This shortcut bypasses the
+            // #gridContainer handlers, so it needs its own guard.
+            if (state.isGridReloading || state.editingCellInfo || document.activeElement.tagName === 'INPUT' || document.activeElement.tagName === 'TEXTAREA') return;
 
             if (state.selectedTable) {
                 event.preventDefault();
@@ -196,7 +199,10 @@ function setupGlobalShortcuts() {
 
         // Delete / Backspace
         if ((event.metaKey || event.ctrlKey) && (event.key === 'Delete' || event.key === 'Backspace')) {
-            if (state.editingCellInfo || document.activeElement.tagName === 'INPUT' || document.activeElement.tagName === 'TEXTAREA') return;
+            // Bail during a grid reload: deleting now would act on row/column/cell
+            // selections from the stale result set about to be replaced. Bypasses the
+            // #gridContainer handlers, so it needs its own guard.
+            if (state.isGridReloading || state.editingCellInfo || document.activeElement.tagName === 'INPUT' || document.activeElement.tagName === 'TEXTAREA') return;
 
             if (state.selectedTable && state.selectedTableType === 'table') {
                 event.preventDefault();
diff --git a/core/ui/web-viewer.js b/core/ui/web-viewer.js
index e131e25..ae1cbaf 100644
--- a/core/ui/web-viewer.js
+++ b/core/ui/web-viewer.js
@@ -186,7 +186,9 @@ async function initializeApp() {
 
             // Cmd+A / Ctrl+A
             if ((event.metaKey || event.ctrlKey) && event.key === 'a') {
-                if (state.editingCellInfo || document.activeElement.tagName === 'INPUT') return;
+                // Bail during a grid reload: "select all" would capture row ids from
+                // the stale, about-to-be-replaced result set (mirrors core viewer.js).
+                if (state.isGridReloading || state.editingCellInfo || document.activeElement.tagName === 'INPUT') return;
 
                 if (state.selectedTable) {
                     event.preventDefault();
@@ -196,7 +198,9 @@ async function initializeApp() {
 
             // Delete / Backspace
             if ((event.metaKey || event.ctrlKey) && (event.key === 'Delete' || event.key === 'Backspace')) {
-                if (state.editingCellInfo || document.activeElement.tagName === 'INPUT' || document.activeElement.tagName === 'TEXTAREA') return;
+                // Bail during a grid reload: deleting now would act on selections
+                // from the stale result set about to be replaced (mirrors viewer.js).
+                if (state.isGridReloading || state.editingCellInfo || document.activeElement.tagName === 'INPUT' || document.activeElement.tagName === 'TEXTAREA') return;
 
                 if (state.selectedTable && state.selectedTableType === 'table') {
                     event.preventDefault();
diff --git a/website/public/sqlite-viewer/viewer.html b/website/public/sqlite-viewer/viewer.html
index a4add1a..aa96d82 100644
--- a/website/public/sqlite-viewer/viewer.html
+++ b/website/public/sqlite-viewer/viewer.html
@@ -364,7 +364,7 @@
     </div>
 
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