[BUG] Agent Teams mates hidden and unopenable if more than 6 Agents when collapsed into "background tasks"

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 running agent teams with more than 6 agents they get hidden behind "Background Tasks" .
This can be selected but not opened to see the teammates.

<img width="1459" height="192" alt="Image" src="https://github.com/user-attachments/assets/105da7ce-7f92-43b1-bde0-df137acf429f" />

What Should Happen?

A window to show all the teammates and select the one you want to check/interact with.

Error Messages/Logs

Steps to Reproduce

Start Agent Teams, Have more than 6 Team mates. Be using inline not Separate Windows (Tmux).

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.161

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Warp

Additional Information

_No response_