[Cowork] Dispatch causes black screen freeze, requires full data wipe to recover

Description

Using the Dispatch feature in Cowork causes the entire Claude Desktop app to freeze with a black screen. The app becomes completely unresponsive and cannot be recovered without force-killing processes and clearing local data.

Steps to reproduce

1. Open Claude Desktop (Cowork mode)
2. Click Dispatch to start a dispatched task
3. App freezes — screen goes black with a few black lines visible
4. App is completely unresponsive (Cmd+Q does not work)

Recovery attempts (all failed to fix Dispatch)

• Force-killing all Claude processes (killall -9 Claude)
• Clearing GPU/renderer cache (GPUCache, Cache, Code Cache, DawnGraphiteCache, Session Storage)
• Launching with --disable-gpu --disable-gpu-compositing
• Clearing local-agent-mode-sessions, IndexedDB, Local Storage
• Full wipe of ~/Library/Application Support/Claude/ (nuclear option)

After full wipe, normal Cowork chat works, but Dispatch still causes the freeze. Additionally, the full wipe erased all Cowork conversation history with no way to restore — restoring the backed-up data causes the app to crash again.

Relevant log errors

[LOCAL_SESSION] [RenderLoopDetector] Rapid re-rendering in CCSessionList: 20 renders in 1000ms
[REACT_QUERY_CLIENT] QueryClient error: Error: Not found
[REACT_QUERY_CLIENT] QueryClient error: Error: ["account_profile"] data is undefined
CSP violation: Connecting to 'https://a-api.anthropic.com/v1/m' blocked by Content Security Policy

Environment

• Claude Desktop: 1.1.7464
• macOS: 15.6.1 (Build 24G90)
• Multiple MCP servers connected (Figma, Gmail, Google Calendar, Microsoft Teams, Vercel, Google Drive, Chrome, etc.)

Expected behavior

Dispatch should execute without freezing the app. If Dispatch fails, it should fail gracefully without requiring a full data wipe.

Impact

• Complete loss of Cowork conversation history
• App unusable until data is wiped
• Dispatch feature entirely broken — cannot use at all