[BUG] Claude Code sometimes stop when running subagents, - I am not talking about the flickering. Latest version, Windows 11.

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?

<img width="747" height="980" alt="Image" src="https://github.com/user-attachments/assets/b445a798-c592-4a33-863b-1f2e75b9e1db" />
This image is at the buttom of the terminal. It runs a subagent and there is the flickering but that's been there for a while.
But it just like stops suddenly, the entire terminal gets stuck with no way to unfreeze it and when I open it back and return to the chat all the sub-agent's work is lost.

What Should Happen?

It should continue running smoothly and it would be nice if it didn't flicker too.

Error Messages/Logs

Steps to Reproduce

Tell Claude Code to run a sub-agent on VScode Windows and try it for 3-4 times on long requests and hope it happens.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.37

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

<img width="747" height="980" alt="Image" src="https://github.com/user-attachments/assets/dd80ab28-dec7-4755-a110-54719ced73ae" />
to be clear the image is at the last row of the terminal, not a different point.