v1.39.0 - Nodes get stuck in snap mode

### Prerequisites

- [x] I am running the latest version of ComfyUI
- [x] I have searched existing issues to make sure this isn't a duplicate
- [x] I have tested with all custom nodes disabled ([see how](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled))

### What happened?

Nodes randomly get stuck in snap-to-grid mode without ever having pressed or held shift

https://github.com/user-attachments/assets/fe05f5e1-7786-4b6d-976f-3e8ae0be48cb

### Steps to Reproduce

1.yes
2.
3.

### How is this affecting you?

Feature doesn't work as expected

### ComfyUI Frontend Version

1.39.0

### Browser

Chrome/Chromium

### Console Errors

```javascript

```

### Logs

```shell

```

### Additional Context

_No response_

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-8393-v1-39-0-Nodes-get-stuck-in-snap-mode-2f76d73d36508159849fd7fb793122ec) by [Unito](https://www.unito.io)