[BUG] If a sub-agent is called within the process, it will get stuck.

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?

If a sub-agent is called within the process, it will get stuck.

I checked with version 2.0.22 and found that it was like this. Then I went back to many previous versions, even version 2.0.8, and it was still the same. I think it might be a problem with the model adaptation. Could it be because it calls Haiku 4.5 internally?

What Should Happen?

If a sub-agent is called within the process, it will get stuck.

Error Messages/Logs

Steps to Reproduce

If a sub-agent is called within the process, it will get stuck.

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.0.22

Claude Code Version

2.0.22

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Warp

Additional Information

_No response_