[BUG] Dispatch API Error: 400

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?

Any message I send in dispatch shows the error attached. I am using Claude max. I have debugged and troubleshot with Ai and Claude code.

<img width="1320" height="2868" alt="Image" src="https://github.com/user-attachments/assets/d1f38780-fd17-4a47-afdd-d384574381d2" />

What Should Happen?

Dispatch should respond appropriately

Error Messages/Logs

API Error: 400 {“type”:“error”,“error”:{“type”:“invalid_request_error”,“message”:“The request body is not valid JSON: invalid high surrogate in string: line 1 column 295204 (char 295203)”},“request_id”:“req_011CahoftjanfvWauQNnAfto”}

Steps to Reproduce

Sending a message to dispatch

<img width="1320" height="2868" alt="Image" src="https://github.com/user-attachments/assets/f272a132-ed61-4e64-a7a9-ae923b825e17" />

Claude Model

Not sure / Multiple models

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

1.5354.0

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Other

Additional Information

Claude desktop dispatch is stuck