Subgraphs vae encode previews appear stretch!! after update to the last comfyui version

### Custom Node Testing

- [ ] 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

the normal size vae encode preview as before!

### Actual Behavior

after update from 0.27 to 0.30 comfyui version in the subgraphs the ksampler vae encode preview during the generation show totally stretched!! and can´t resized! but the preview inside of it in the ksample still right, this only happens in the subgraphs!! how to solve it?

### Steps to Reproduce

using comfyui 0.30

### Debug Logs

```powershell
none
```

### Other

_No response_

Reproduce the issue in ComfyUI 0.30 with a KSampler VAE encode preview inside a subgraph, first testing with custom nodes disabled as requested. Compare the subgraph preview with the correctly sized preview inside the KSampler and with version 0.27. Done means the subgraph preview keeps the normal aspect ratio and can be resized.

Written by the indexing model from the issue text.