Quality degradation over multiple generations and/or LoRA effects accumulate.

### 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

Quality and the effect of LoRAs should be consistent between generations.

### Actual Behavior

Quality degrades incrementally with each generation, the effect of LoRAs seems to also accumulate until it overwhelms the generation.

### Steps to Reproduce

This was noted when generating video using WAN2.2, but it seems to be a more widespread issue.
Batching generations degrade over time.
A search for the issue yields a couple Reddit discussions, this quote from here (https://www.reddit.com/r/comfyui/comments/1ng8y0k/wan_22_goes_weird_after_some_generations/) describes the problem:
"I had this happen on other models and I thought it was some sort of weird caching bug due to the base model having Loras added for a gen and then the next run the base is the base model and the Lora, so it adds the Lora again on a loop each generation compounding the Loras."

### Debug Logs

```powershell
No error logs so not applicable.
```

### Other

_No response_