RAM not being fully released after WAN 2.2 generation

### 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

RAM should be fully empty besides the small amount comfyui keeps in reserve.

### Actual Behavior

I cannot disable custom nodes to see if this persists. I am using torchcompile and sagattention, however the issue persisted before that. Running pretty much any generation results (even after clearing node cache and releasing models) in circa 30gb RAM being reserved for no purpose. With each generation this memory leaked increases until ram is saturated and spills into swap.

### Steps to Reproduce

Run a wan 2.2 video generation.

### Debug Logs

```powershell
there are none
```

### Other

RTX 5090
64gb ram
100gb swap
swappiness 80
zram after swap