[BUG] Stop button from some chats in Claude code is missing.

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 a chat session has a long-running turn (Bash/PowerShell tool
waiting), the Stop button disappears completely. The session appears
frozen with no way to interrupt it.
This happened repeatedly today across multiple sessions.

What Should Happen?

Always i can stop the Chat Clode sesssion with the stop button.

Error Messages/Logs

Steps to Reproduce

1. Start a long-running Bash command in a chat (e.g. npm install,

render script, or Vite server)

1. Wait for the turn to hang/freeze
2. Stop button disappears — cannot interrupt the session
3. Only fix: close and reopen the tab

<img width="1064" height="322" alt="Image" src="https://github.com/user-attachments/assets/a68e291c-7f30-486a-9df8-9ee965bb6643" />
<img width="1030" height="422" alt="Image" src="https://github.com/user-attachments/assets/3d965967-246d-44d7-8eb7-a8d10fc995c0" />

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

current to date

Platform

Anthropic API

Operating System

windows

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_