2 people reported
All time, since Sep 23.
Invalid thinking block signature
“When using Claude through AWS Bedrock with my own keys, chats work for a while, then fail mid-conversation with a thinking-block signature error.”
Is this your bug? What gets counted gets fixed. Pile on.
Paste this into your agent. It files your report, with your error and version.
I hit this bug: rapsheet.dev/sheets/cursor/issues/2278/file Follow it to file my report. Show me the text before you send.
No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends
Chats fail with invalid thinking block signature error mid-conversation. Claude via AWS Bedrock returns a 400 saying the block "is bound to a different conversation" after long agentic turns.
Is this your bug?
File my report- Where
- Agent chat
- Error text
Invalid `signature` in `thinking` block. The block is bound to a different conversation.- Versions
- 3.21.18 to 3.25.9
- Platforms
- macOS
- How bad
- Breaks a normal workflow.