mac studio m1 ultra 128gb wan 2.2 black videos and OOM error !!!!!

### 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

mac studio m1 ultra 128gb wan 2.2 black videos when generate 81 frames
when generate 15 frames its fine when 81 black video
also got oom when generate wan 2.2 with lightx lora !!!!!!!!!!
pleaseee fixxxxx

### Actual Behavior

mac studio m1 ultra 128gb wan 2.2 black videos when generate 81 frames
when generate 15 frames its fine when 81 black video
also got oom when generate wan 2.2 with lightx lora !!!!!!!!!!
pleaseee fixxxxx

### Steps to Reproduce

mac studio m1 ultra 128gb wan 2.2 black videos when generate 81 frames
when generate 15 frames its fine when 81 black video
also got oom when generate wan 2.2 with lightx lora !!!!!!!!!!
pleaseee fixxxxx

### Debug Logs

```powershell
mac studio m1 ultra 128gb wan 2.2 black videos when generate 81 frames
when generate 15 frames its fine when 81 black video
also got oom when generate wan 2.2 with lightx lora !!!!!!!!!!
pleaseee fixxxxx
```

### Other

_No response_

No source file, test, or actionable debug log is identified. Start by reproducing the difference between 15 and 81 frames on the listed Mac Studio setup, then separately test WAN 2.2 with the LightX LoRA while collecting real logs. Done would require identifying and fixing the cause of the black video and out-of-memory failure.

Written by the indexing model from the issue text.