diff --git a/core-tests/e2e-tests/spring/spring-rest-openapi-v3/src/main/kotlin/com/foo/rest/examples/spring/openapi/v3/flakinessdetect/FlakinessDetectRest.kt b/core-tests/e2e-tests/spring/spring-rest-openapi-v3/src/main/kotlin/com/foo/rest/examples/spring/openapi/v3/flakinessdetect/FlakinessDetectRest.kt
index 7996b5b345..09ee1ce9fa 100644
--- a/core-tests/e2e-tests/spring/spring-rest-openapi-v3/src/main/kotlin/com/foo/rest/examples/spring/openapi/v3/flakinessdetect/FlakinessDetectRest.kt
+++ b/core-tests/e2e-tests/spring/spring-rest-openapi-v3/src/main/kotlin/com/foo/rest/examples/spring/openapi/v3/flakinessdetect/FlakinessDetectRest.kt
@@ -9,6 +9,7 @@ import org.springframework.web.bind.annotation.RequestParam
 import org.springframework.web.bind.annotation.RestController
 import java.time.LocalDateTime
 import java.time.format.DateTimeFormatter
+import java.util.UUID
 import kotlin.math.abs
 import kotlin.math.max
 import kotlin.math.min
@@ -19,6 +20,18 @@ class FlakinessDetectRest {
 
     companion object{
         val formatter = DateTimeFormatter.ofPattern("HH:mm:ss.SSS yyyy-MM-dd EEEE 'Week' ww")
+        private val START_UP_OBJECT_TAG = arrayOf(javax.validation.constraints.Pattern.Flag.CASE_INSENSITIVE).toString()
+    }
+    @GetMapping(path = ["/objectFlag"])
+    open fun getEmptyFlag()  : ResponseEntity<String> {
+
+        return ResponseEntity.ok(START_UP_OBJECT_TAG)
+    }
+
+    @GetMapping(path = ["/stringuuid"])
+    open fun getStringuuid() : ResponseEntity<String>{
+
+        return ResponseEntity.ok( UUID.randomUUID().toString())
     }
 
     @GetMapping(path = ["/stringfirst/{n}"])
@@ -88,4 +101,6 @@ data class FlakinessDetectData(
 data class TimeAgoData(
     val message: String,
     val calculatedPastTime: String
-)
\ No newline at end of file
+)
+
+class EmptyForFlag(val flag: String)
\ No newline at end of file
diff --git a/core/src/main/kotlin/org/evomaster/core/search/service/FlakinessDetector.kt b/core/src/main/kotlin/org/evomaster/core/search/service/FlakinessDetector.kt
index 7793a8d641..ba200cb5b3 100644
--- a/core/src/main/kotlin/org/evomaster/core/search/service/FlakinessDetector.kt
+++ b/core/src/main/kotlin/org/evomaster/core/search/service/FlakinessDetector.kt
@@ -104,7 +104,7 @@ class FlakinessDetector<T: Individual> {
             } else {
                 val normO = derive(oBody)
                 if (rBody != normO) {
-                    resultToUpdate.setFlakyBody(oBody)
+                    resultToUpdate.setFlakyBody(normO)
                 }
             }
         }
@@ -132,7 +132,7 @@ class FlakinessDetector<T: Individual> {
                  */
                 val normO = derive(oMsg)
                 if (rMsg != normO) {
-                    resultToUpdate.setFlakyErrorMessage(oMsg)
+                    resultToUpdate.setFlakyErrorMessage(normO)
                 }
             }
         }
diff --git a/core/src/main/kotlin/org/evomaster/core/utils/FlakinessInferenceUtil.kt b/core/src/main/kotlin/org/evomaster/core/utils/FlakinessInferenceUtil.kt
index 191094ffa6..37e7c9d7ea 100644
--- a/core/src/main/kotlin/org/evomaster/core/utils/FlakinessInferenceUtil.kt
+++ b/core/src/main/kotlin/org/evomaster/core/utils/FlakinessInferenceUtil.kt
@@ -66,7 +66,7 @@ object FlakinessInferenceUtil {
     /**
      * Match JVM object toString like com.foo.Bar@1a2b3c.
      */
-    private val OBJECT_AT_REGEX = Regex("[A-Za-z0-9_.$]+@[0-9a-fA-F]+")
+    private val OBJECT_AT_REGEX = Regex("""[\[A-Za-z0-9_.$;]+@[0-9a-fA-F]+""")
 
     /**
      * Match hex pointers like 0x1a2b3c.