[BUG] Claude Desktop crashes silently when project folder is on a virtual/cloud-mapped drive

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?

Bug: Claude Desktop crashes silently when project folder is on a virtual/cloud-mapped drive

Environment

OS: Windows 10 (Build 26200.8246)
Claude Desktop: 1.3109.0 (35cbf6), built 2026-04-16
Claude Code CLI: 2.1.111 (installed 2026-04-16)
Virtual drive: V: — SharePoint mounted via Zee Drive
Summary
The desktop app crashes immediately after I enter a prompt in any project folder located on my V: drive (Zee Drive / SharePoint). The window closes with no error dialog. Folders on my local C: drive work fine. This started today; V: folders worked yesterday. Note: desktop app and CLI were both updated on April 16, suggesting a regression in this release.

Steps to reproduce

Open Claude Desktop, select a project folder on V: (e.g., V:\09 AI Skills\Script - WIP and Bill)
Type any prompt and submit
App closes immediately
Diagnostics already done

No Windows Event Viewer APPCRASH / Application Error / WER entry for Claude.exe
No Crashpad dumps since January → not a native/Chromium crash; app is exiting silently at the JS layer
No session file is written in ~/.claude/sessions/ for the crashed attempts — CLI subprocess dies before writing
main.log shows [LocalSessionManager] Skipping git info for non-local path: V:\... (detects V: as non-local) but no error afterward
Running the CLI directly works: cd /d "V:\09 AI Skills\Script - WIP and Bill" then claude.exe --print "hi" returns cleanly with exit code 0
Crash happens on every V: folder, not just one. Renaming (removing & from folder name) did not help.
Installed Claude Code CLI binary: C:\Users\lliu\AppData\Roaming\Claude\claude-code\2.1.111\claude.exe
Conclusion
The CLI itself works fine with V: as cwd. The bug is in the desktop app's wrapper/spawn logic for virtual drives — likely during workspace setup (file watcher, cwd resolution, or UNC backing-path lookup). Desktop catches the error and exits without logging.

What Should Happen?

Claude should not crash when I point desktop app to a local drive mapped to a Sharepoint library.

Error Messages/Logs

Steps to Reproduce

Open Claude Desktop, select a project folder on V: (e.g., V:\09 AI Skills\Script - WIP and Bill)
Type any prompt and submit
App closes immediately
Diagnostics already done

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Claude Desktop: 1.3109.0 (35cbf6), built 2026-04-16

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_