[Bug][Claude Desktop] Chats inside a Project no longer sort by last message time (Windows)

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?

Actual behavior

Chat order does not update with activity. The list seems ordered by some stale timestamp (creation date?), so the most recently active chat is not at the top. Restarting the app does not change the order.

Notes

• This changed recently without any mention in release notes; sorting by recency worked correctly before.
• Web app (claude.ai) on the same account is unaffected and sorts correctly.
• #87297 reports the same behavior on macOS but is marked invalid — this is a properly formatted cross-platform report of the same bug.
• Related: #59282 (Projects view "Recent" sort uses stale timestamps), #84332 (Projects "Last updated" sort ignores chat activity), #56060 (Sort by Recency has no effect with Group by Project). This report is about chats inside a single Project, possibly the same root cause on a different surface.

What Should Happen?

The chat list inside a Project should be ordered by last message time, newest first. Sending a message in any chat should move that chat to the top of the project's chat list — as it worked before the recent update, and as the web app (claude.ai) still behaves on the same account.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Desktop on Windows 11.
2. Open a Project containing several chats (e.g. 8-10 chats created on different days).
3. Note the order of chats in the project's chat list.
4. Open a chat that is NOT at the top of the list and send a message in it.
5. Observe the chat list order.
6. Restart the app and observe the order again.

Result: the chat that just received a message does not move to the top. The order stays fixed/stale and is unaffected by activity or restart.

No specific files or code are needed — reproduces with any Project containing multiple chats.

Claude Model

Not sure / Multiple models

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

N/A — Claude Desktop app bug, not CLI.

Platform

Other

Operating System

Windows

Terminal/Shell

Other

Additional Information

_No response_