esc undo doesnt revert back file to how it was at the reverted message point

Question

### What version of Codex CLI is running?

codex-cli 0.137.0

### What subscription do you have?

pro

### Which model were you using?

5.5

### What platform is your computer?

linux

### What terminal emulator and version are you using (if applicable)?

_No response_

### Codex doctor report

```json
when reverting to previous message in a session using esc , the files are not reverted back
```

### What issue are you seeing?

the files are not reverted back  when undo ing

### What steps can