[BUG] "Resuming your cloud container" stalls forever and now I have lost all my work.

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?

I went from a Claude code terminal session to the web for the ultraplan feature. I spend hours refining the plan and implementing steps 1 to 5 of a 6 step plan, and than it hang. Can't resume the cloud container. Now I have to start all over again. This is extremely frustrating, not to speak of all the wasted tokens.

https://claude.ai/code/session_0153CgaByAjj5JgiVMHFgMNN

What Should Happen?

It should have finished the session and get the results back to the terminal. The least it could do is allow me access to what has already been done.

Error Messages/Logs

Steps to Reproduce

Write some code in Claude code in the terminal.
Switch to ultraplan on the web to refine and implement plan.

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.143

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_