[BUG] API Error: 400. Each `tool_use` block must have a corresponding `tool_result` block in the next

[Emasoft]

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

After a while that I use Claude Code I get this error that prevents my message to be received and processes by Claude:

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.78: `tool_use` ids were found without `tool_result` blocks
    immediately after: toolu_015XCpRzgdbqwkNnYnDw8fCz. Each `tool_use` block must have a corresponding `tool_result` block in the next
    message."},"request_id":"req_011CTNtey7CgGB1ZQZ1ykx4V"}

Claude is stuck with this error even if I do the following:

• I exit Claude Code and resume
• I press esc twice and rewind to the previous statement
• I uninstall all hooks and mcp

The only way to solve the issue is to use the /clear command, but this erases my chat history with hours of work. The issue happens randomly but often, sometimes even 2 commands after the /compact execution.

What Should Happen?

Claude Code should accept my messages.

Error Messages/Logs

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.78: `tool_use` ids were found without `tool_result` blocks
    immediately after: toolu_015XCpRzgdbqwkNnYnDw8fCz. Each `tool_use` block must have a corresponding `tool_result` block in the next
    message."},"request_id":"req_011CTNtey7CgGB1ZQZ1ykx4V"}

Steps to Reproduce

Cannot find a pattern yet. It happens randomly but often.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

1.0.120

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

No response