Web interface: Node positions

### 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

Nodes to be kept on position after interface refresh

### Actual Behavior

On random, mainly some interface refresh, some or all nodes, are repositioned randomly, even if nodes are pinned.

### Steps to Reproduce

One of this action moves nodes around :
- Refresh the page
- Update with comfy-manager
- restart.

### Debug Logs

```powershell
I have no particular log for this bug
```

### Other

_No response_