Preview Mode Bug: Displays Previous Process Image Instead of Current Upon Regeneration

### Expected Behavior

Each regeneration of the preview should display the image from the current process.

### Actual Behavior

The preview consistently shows the image from the previous process.

### Steps to Reproduce

Using the default workflow, set the preview mode to automatic, generate an image, then alter the prompt and produce another image

### Debug Logs

```powershell
see the video： https://github.com/user-attachments/assets/e379cc25-8d63-423e-8dcb-90058033a00d
```

### Other

https://github.com/user-attachments/assets/e379cc25-8d63-423e-8dcb-90058033a00d