Copy-Paste from old buffer

### 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

Normal Ctrl+C/Ctrl+V Buffer work

### Actual Behavior

Sometimes when I copy a node or several and then when I use windows buffer on Ctrl+V in other windows or programs, all the nodes are pasted to the work flow.

### Steps to Reproduce

Copy a node, paste the node, go to other chrome pages, copy/paste smth, go back ti find extra nodes in the workflow

### Debug Logs

```powershell
none
```

### Other

_No response_