UMG Drag Drop Not Working - 4.20 (Packaged / Standalone)
We've encountered which seems to be a bug after upgrading our project to UE 4.20.1. Drag and drop operations just become broken on packaged builds or launching stand-alone, despite working inside the Editor (PIE).
I've created a new project to isolate the problem, this is how it is configured:
Slot component (which will be dragged): UMG UI (no behavior, just using the slot-component ui showed previously): Level Blueprint (used to add the widget to screen)
The problem: Each slot ca only be dragged once, after this "OnDragDetect" event will not trigger anymore, (this only occur when running Packaged builds or launching stand-alone version through the editor).
Is this an confirmed bug ? Any help would be appreciated. Thanks!
asked Aug 14 '18 at 10:36 PM in Bug Reports
This problem was occurring since i was passing the same widget (self) as payload parameter during drag operation creation, which seems to trigger some recursive conflict on UMG input handling system. Passing only the image (or any other component) as payload parameter will fix this issue.
I still think this is a bug, since PIE / Stand Alone and Packaged version behaves differently, also, this was not happening on UE 4.19.
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