[BUG] Can't navigate Background task list with arrow keys (linux)

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 in Background Task list, I am unable to nawigate through the list of (at the moment 3) background running tasks. I can open first one, but I cannot navigate to any other to see the status/output.

What Should Happen?

I should be able to navigate through the list with up/down arrow keys.

Error Messages/Logs

Steps to Reproduce

Claude Code in Linux terminal:

• open claude
• run background tasks
• navigate at the bottom to "3 background tasks", press enter
• list opens, but I cannot navigate up/down the list, enter works, but opens the first one
• happens in any terminal in any desktop environment

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.19

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Xterm

Additional Information

_No response_