[bug] vae encode tiled is bugged with ltx2 and causes ghosting in between temporal chunk.

### Custom Node Testing

- [x] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Expected Behavior

no ghosting.

### Actual Behavior

https://www.reddit.com/r/StableDiffusion/comments/1q8ae12/does_anyone_else_have_this_artifact_issue_with/

### Steps to Reproduce

Reproduce by
load video-> encode tiled -> vae decode tiled -> video. to fix i just avoid temporal gaps by increasing temporal size but the last frame will still get some ghosting.

### Debug Logs

```powershell
got prompt
0 models unloaded.
Unloaded partially: 0.00 MB freed, 0.07 MB remains loaded, 648.02 MB buffer reserved, lowvram patches: 0
0 models unloaded.
Unloaded partially: 0.00 MB freed, 0.07 MB remains loaded, 648.02 MB buffer reserved, lowvram patches: 0
Prompt executed in 41.09 seconds
```

### Other

_No response_