Can't get UMG widgets to overlap

I’m trying to get UMG widgets to overlap after drag&drop operation. If I drop widget on top of another widget, the dropped widget moves to top left corner, ignoring “Set Position in Viewport” in blueprint. Position in top left corner isn’t always exactly the same. Also, widgets are able to overlap as long as mouse cursor isn’t on top of other widgets when dropping.

I’ve been trying to get it work, no luck, and I’m out of ideas.
Anyone know if this is even possible to fix?

Hello! I have very close to your question, but in my case my widget not moving in the corner but disappear. If you find any solution of your problem I will be glad to hear it.