MCP server aborts connection (no HTTP response) when any Authorization Bearer header is present

[danbloor]

Describe the bug
MCP server aborts connection (no HTTP response) when any Authorization Bearer header is present

Expected behaviour
MCP Server to authenticate using secret only

Predbat version

v8.40.12

Environment details

HAOS add-on (6adb4f0d_predbat), MCP component enabled via apps.yaml (mcp_enable: true, default mcp_port: 8199), Components page shows MCP Server as Active.

Steps to reproduce:
Enable MCP per docs (mcp_enable: true), confirm Active on Components page.
Send a POST to /mcp with Authorization: Bearer <mcp_secret> and a valid JSON-RPC initialize body, Content-Type: application/json, Accept: application/json, text/event-stream.
Connection is accepted, request body sent successfully, then server aborts the connection with no HTTP response at all.

Log file

63846 | 2026-06-19 14:30:51.127993: MCP POST: Missing or invalid Authorization header
63845 | 2026-06-19 14:30:51.127954: MCP POST: Received request from 10.0.1.84