[BUG] Dispatch: messages processed but responses never render/delivered (macOS, read receipt only)

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?

Messages from mobile Dispatch get marked as read; backend processes them (tasks may run, audit logs show responses); no reply ever appears in the Dispatch thread on desktop or mobile.

What Should Happen?

When I send a message through Dispatch (from the mobile app or directly in the desktop Cowork/Dispatch tab), the following should occur:
• The message is received and processed by the backend.
• Claude generates a full response (including any tool use, computer actions, or streaming output).
• The response is delivered and rendered visibly in the Dispatch/Cowork conversation thread on both the Claude Desktop app and the mobile app.
• Normal UI behavior: loading indicators appear during processing, followed by the complete reply appearing in the chat history.

Error Messages/Logs

Steps to Reproduce

1. Ensure the Claude Desktop app is running on macOS with Dispatch / Cowork enabled and successfully paired with the mobile Claude app (via QR code).
2. From the mobile Claude app, start (or continue) a Dispatch session and send any message — for example, a simple test like “Reply with OK” or a more complex task.
3. Observe the behavior on both the mobile app and the Claude Desktop app:

• The message is marked as “read”.
• A loading indicator may appear briefly.
• The backend processes the turn successfully (tasks may even execute in the background, and logs show “Turn succeeded” / “reportDelivery status=processed”).
• No response text is ever rendered or displayed in the Dispatch/Cowork conversation thread on desktop or mobile.
This happens consistently with new or existing Dispatch sessions. Direct use of the Cowork or Code tab inside the desktop app works normally.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.1.9310

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_