Cowork browser automation call hangs indefinitely (page never loads) — consumed ~50% of usage with no output

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Other unexpected behavior

What You Asked Claude to Do

Oaktree_Claude_About_Page_Command.txt

What Claude Actually Did

1. Initiated a browser automation tool call (via Claude in Chrome)
2. Attempted to load the target page
3. The page never loaded — no content, no error, no timeout
4. The session remained stuck in this loading state with no way to interrupt
5. During this stuck period, usage climbed from ~3% to ~54% with zero completed output

Expected Behavior

The browser automation call should have either:

• Successfully loaded the page and completed the task, or
• Timed out and surfaced a clear error after a reasonable interval, or
• Remained interruptible so the session could be stopped without further usage loss

Instead it consumed roughly half a usage window on a call that produced no result.

Files Affected

None — no files were created, modified, or deleted. This was a browser
automation task, not a file-editing task.

Permission Mode

Accept Edits was OFF (manual approval required)

Can You Reproduce This?

Haven't tried to reproduce

Steps to Reproduce

1. Start a Cowork session on Desktop
2. Give a task that requires browser automation (via Claude in Chrome)
3. Browser automation call is initiated but the target page never loads
4. Session remains stuck/loading with no timeout, error, or way to interrupt
5. Usage jumps significantly (in this case, 3% → 54%) with no completed action or output

Claude Model

Sonnet

Relevant Conversation

No specific Claude message text is available — the browser automation call
hung silently. The tool call remained in a "loading" state indefinitely
with no visible progress, error, or output before usage had already
climbed to 54%.

Impact

High - Significant unwanted changes

Claude Code Version

The Claude Code CLI installed in this environment is version 2.1.243

Platform

Other

Additional Context

• Task involved browser automation via Claude in Chrome from Cowork Desktop
• The target page never loaded; the call did not time out or surface an error
• No way to interrupt or recover the stuck call was available
• Usage consumption (3% → 54%) appears disproportionate to zero completed output
• Related existing reports: anthropics/claude-code#27931, #45531