[BUG] Switching in between conversation and agent session causes content load render issue

### Preflight Checklist

- [x] I have searched [existing issues](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug) 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?

When trying to switch between different conversation sessions or agent sessions this is what getting shown

### What Should Happen?

Correctly showing the conversation history and changes done.

### Error Messages/Logs

```shell

```

### Steps to Reproduce

NA

### Claude Model

Other

### Is this a regression?

I don't know

### Last Working Version

_No response_

### Claude Code Version

2.1.270 (Claude Code)

### Platform

Other

### Operating System

Windows

### Terminal/Shell

Windows Terminal

### Additional Information

_No response_