[BUG] Agent team is not terminated after Claude informs that the team has been terminated

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?

When I am using the teammate and it opens several panels with different instances of Claude Code, after finishing the job, the orchestrator agent says that the teams have been shut down, some instances are actually shut down, while others are not, so it stays in an infinite loop in run.

In image 1, the orchestrator agent reports that the team has been shut down, but in image 2, you can see that some instances have actually been closed while others have not. Meanwhile, in image 3, you can see Claude running in a loop after finishing.

<img width="1920" height="1035" alt="Image" src="https://github.com/user-attachments/assets/ccdf3603-3eef-4c4b-90e6-914cea60b521" />
<img width="1920" height="1030" alt="Image" src="https://github.com/user-attachments/assets/8d7f5f88-2646-4a6e-aa36-bd9eb28f1099" />
<img width="1920" height="1033" alt="Image" src="https://github.com/user-attachments/assets/9885afc2-e254-4268-a6b6-9a24f1f3e529" />

What Should Happen?

After finishing the job, the orchestrator agent closes all instances, kills the team, ensures that the tmux panels have been killed, and then returns the output to the user informing them that the team has been terminated.

Error Messages/Logs

Steps to Reproduce

When I use Teammate

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.56

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

_No response_