the mask editor displays abnormally, showing only black.

### 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)

### Your question

when the mask editor popup is first opened, it can display the image normally. however, once a mask or coloring is added and saved, when the mask editor is opened again later, it only shows a completely black image and does not display the loaded image.

### Logs

```powershell

```

### Other

_No response_

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*This issue is transferred from: https://github.com/comfyanonymous/ComfyUI/issues/11392*

Original issue was created by @kaiery at 2025-12-18T06:02:21.000Z

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-7612-the-mask-editor-displays-abnormally-showing-only-black-2cd6d73d36508189899fd6f5ecec9936) by [Unito](https://www.unito.io)