[BUG] Cowork disappears after automatic UI re-render during active session, restored after re-login (Claude Desktop, macOS Sequoia 15.7.3)

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 actively using the Claude Desktop app, the UI automatically re-rendered during normal usage, and after the re-render the Cowork feature was no longer visible anywhere in the interface — no menu item, no sidebar entry, no settings option. The app itself remained functional for other features.

No error message was displayed at any point. Restarting the app did not restore Cowork. Signing out and signing back in restored Cowork immediately.

This suggests a runtime state issue (such as a feature flag refresh, session/entitlement re-fetch, or background reconnection failure) rather than a stale state at app launch.

Note: This report is about the Claude Desktop app (the chat app), not the Claude Code CLI. Filing here because area:cowork and area:desktop labels exist in this repository.

What Should Happen?

The Cowork feature should remain consistently visible throughout an active session. Background UI re-renders or state refreshes should not remove access to features the user is entitled to without any error or notification.

Error Messages/Logs

No error messages were displayed in the UI.
(Console logs from the desktop app were not captured at the time. If the issue reproduces, I will attach DevTools console output.)

Steps to Reproduce

I do not have a deterministic reproduction path. The sequence I observed:

1. Open Claude Desktop app (version 1.4758.0) on macOS Sequoia 15.7.3
2. Use the app normally with Cowork visible and accessible
3. At some point during active use, the UI re-renders automatically (no user action triggered it)
4. After the re-render, Cowork is no longer visible in the UI
5. Restart the app — Cowork is still missing
6. Sign out, then sign back in — Cowork reappears immediately

The trigger for the automatic re-render is unknown. Possible candidates:

• Background feature-flag / entitlements refresh
• Session token refresh
• WebSocket/SSE reconnection after a brief network blip

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude Desktop 1.4758.0 (fb266c), build 2026-04-24T20:22:30.000Z (not Claude Code CLI)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

• This issue concerns the Claude Desktop chat app, not the Claude Code CLI. I am filing here because the repository has active area:desktop and area:cowork labels (e.g., recent issues #54461, #54463).
• If this is the wrong repository for Claude Desktop issues, please let me know the correct channel and feel free to close this.
• I will update this issue if I can capture more details (DevTools console, network requests) on reproduction.
• Account plan: Max