Workflow Contains Unsupported Nodes Warning

### 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?

In the latest version, there’s a new warning that appears when certain nodes aren’t installed.

But I noticed that even when all the nodes are installed and none of them are highlighted in red, the warning still shows up, even though the workflow runs just fine.

When I select all the nodes and copy them into a new empty workflow, the warning disappears.

I’ve also provided a video showing this, and I unpacked all the subgraphs but didn’t find any red highlighted nodes.

https://github.com/user-attachments/assets/1cbe18e0-9daa-4f87-90b6-624ae047dbd7

### Steps to Reproduce

https://github.com/user-attachments/assets/5744879a-b15e-4a35-9391-0e9886b1ac57

### How is this affecting you?

Visual/UI issue only

### ComfyUI Frontend Version

1.32.9

### Browser

Firefox

### Console Errors

```javascript

```

### Logs

```shell

```

### Additional Context

_No response_

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-7015-Workflow-Contains-Unsupported-Nodes-Warning-2b96d73d3650814186d8d5551112e27c) by [Unito](https://www.unito.io)