When undo the latest message, it shows revert 1 message and several tool calls, but the real file is not reverted to the previous content.

An example here: https://opencode.ai/s/zOL38Zus

I have /undo the latest message:

but the file content is still:

# Demo File

This is a sample markdown file created as a demo.

- Item 1
- Item 2
- Item 3

## Code Block Example

```python
print("Hello, world!")
```

It happens with different models, including copilot/gpt-4.1, deepseek-reasoner, qwen3-coder.