[BUG] Cowork Windows — Response not visible until manual page refresh (Ctrl+R)

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?

After submitting a task in Cowork on Windows, Claude's response is not displayed in the UI. The response only becomes visible after manually pressing Ctrl+R to refresh the page. This happens consistently on every Cowork task.
Important: Regular Chat mode works perfectly — responses stream in real-time without any issues. Only Cowork is affected.
The issue persists even with AdGuard (ad blocker) completely disabled, ruling out any network filtering interference.

What Should Happen?

After submitting a Cowork task, Claude's response should appear automatically in the UI — either streamed in real-time or displayed upon completion — without requiring a manual page refresh.

Error Messages/Logs

Steps to Reproduce

Open Claude Desktop on Windows
Switch to the Cowork tab
Submit any task (e.g., "Create a simple text file with Hello World")
Observe: The UI does not display Claude's response
Press Ctrl+R to refresh
Observe: The response is now visible

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

Version 1.1.3541 (1e65e4)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_