[BUG] Background tasks panel shows long-dead Bash tasks as "Running"; survives app restart and manual stop

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?

Background tasks panel shows long-dead Bash tasks as "Running"; survives app restart and manual stop

• Session started in CLI, connected to desktop via /remote-control
• Two run_in_background Bash commands from ~7h ago: one was killed (SIGTERM, exit 143 failure notification was delivered), the other completed (exit 0, completion notification delivered)
• Backend no longer tracks them: TaskStop returns "No task found with ID", no matching processes in ps
• But the desktop "Background tasks" panel still lists both as Running with an ever-growing elapsed timer
• Tried: dismissing, restarting the desktop app, manually stopping them in the panel — entries reappear every time

What Should Happen?

• Expected: task entries should be reconciled/closed when the underlying process exits

Error Messages/Logs

Steps to Reproduce

not sure how to reproduce though.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.172 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_