[BUG] Sidebar sessions/projects disappeared from Code tab, data still exists

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?

Describe the bug
All sessions/projects disappeared from the left sidebar in the Claude Code desktop app (Code tab). Previously had multiple projects and sessions visible, including grouped sessions. Now the sidebar shows nothing.

What I've tried

• Followed the troubleshooting guide — issue persists
• Restarted the app fully
• Checked for active filters/search in the sidebar
• Checked account/workspace selection

Notable detail
The sessions are NOT actually lost — I confirmed via the session-management tools (list_sessions) that all sessions still exist server-side (none archived or deleted), across multiple projects and custom sidebar groups, with activity dating back several months. So this looks like a sidebar rendering/sync bug rather than data loss.

Expected behavior
Sidebar should display existing sessions and groups as before.

Environment

• OS: Windows 11
• Claude Code desktop app (Code tab)

Additional context
Happy to provide more diagnostic info if useful, but withholding specific project names/paths here for privacy.

What Should Happen?

I should see the historic project on thje left bar, they disappeared but claude code "found them", just not visually on the left bar.

Error Messages/Logs

Steps to Reproduce

bugreport.md

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.0.123

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_