[Bug] Main agent state lost when resuming session from Claude Agent Panel

Question

**Bug Description**
this session had a serious bug, the main agent is lost when I get back to this session from claude agent panel.

**Environment Info**
- Platform: darwin
- Terminal: xterm-256color
- Version: 2.1.198
- Feedback ID: 35189f78-ab9c-4bb1-b25d-ccd13a496d97

**Errors**
```json
[]
```