Drag and drop to LoadImage node broken in Legacy UI

[UnSand]

Custom Node Testing

• I have tried disabling custom nodes and the issue persists (see how to disable custom nodes if you need help)

Your question

Describ
After updating ComfyUI to version 9c34f5f and later, the drag-and-drop functionality for the LoadImage node has stopped working specifically in the Legacy UI.

Interestingly, the feature works as expected in the New Frontend (2.0), but fails when switching back to the old interface. This suggests a regression where new global drag-and-drop event handlers are interfering with the legacy node input listeners.

Expected behavior
The LoadImage node in the Legacy UI should accept dragged files and upload them to the input folder, just as it does in the New Frontend (2.0).

Environment
ComfyUI Revision: 9c34f5f and later

Frontend Mode: Legacy UI (Broken) / New Frontend (Working)

Browser: [Microsoft Edge]

OS: [Windows 11]

Additional context
Comparison: I have confirmed that the exact same operation works perfectly in Node 2.0 (New Frontend), but it is a critical blocker for users who prefer or rely on the Legacy UI layout.

Logs

Other

No response

[coderabbitai]

⚠️ Possible Duplicate Issue(s)

• impossible to drag and drop the workflow to the comfyui web interface. #13729

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[UnSand]

This issue did not exist prior to version 9c34f5f.

[MarcBate]

this is one of those major mistakes that the community has been complaining about. how can you not have a test for this?

[Webtransformer]

Same for me

[Den41k92]

I had the same exact problem (legacy ui, drag and drop images + workflows not working) after a recent update and managed to fix it by disabling comfyui-mixlab-nodes
Have you tried with all custom nodes disabled? If it works, try to disable them one by one and see which one causes the issue.

[UnSand]

I had the same exact problem (legacy ui, drag and drop images + workflows not working) after a recent update and managed to fix it by disabling comfyui-mixlab-nodes Have you tried with all custom nodes disabled? If it works, try to disable them one by one and see which one causes the issue.

Yes, I found the source of the problem—it was caused by the Mixlab.

[Webtransformer]

Disabling comfyui-mixlab-nodes also worked for me.

[zejjnt]

Disabling comfyui-mixlab-nodes also worked for me.

That node just complained about wanting to get updated; which did not result in a fix but instead removed all text from all nodes -.-

[zejjnt]

Removed comfyui-mixlab-nodes, did not fix the image import issue :/

[gonzalu]

Not sure it is related but, as of recently, drag and drop of an image to my desktop has stopped working in Chromium based browsers (Edge and Chrome) while still working on Firefox.

[github-actions]

This issue is being marked stale because it has not had any activity for 30 days. Reply below within 7 days if your issue still isn't solved, and it will be left open. Otherwise, the issue will be closed automatically.