[BUG] Returning to a session doesn't scroll to the latest message if a reply arrived while viewing another session

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?

While a session was still generating a response, I switched to a different session to do other work. When I switched back to the original session after its response had finished, the view did not scroll to the newest message — it stayed at roughly the same scroll position I had left it at, so the latest reply wasn't visible until I manually scrolled down.

What Should Happen?

When returning to a session with new messages that arrived while away, the view should automatically scroll to the latest message.

Error Messages/Logs

Steps to Reproduce

1. Start a request in Session A that takes a while to respond
2. While waiting, switch to Session B and work there
3. Once Session A's response has completed, switch back to Session A
4. The view shows an earlier point in the conversation instead of jumping to the latest message

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Claude Code Desktop App (Mac) — version unknown (not the CLI, no claude --version available)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

Using Claude Code Desktop App for Mac (not CLI in terminal). macOS 26.5.2.