UMG in world - button click area is wrong

I have an UMG widget with space set to “World”. That widget has some buttons over the widget’s viewport area. However, the further the button is from the center of the camera screen space.

So for example, if I have a button widget in the bottom left corner of the viewport space, the button’s clickable area is only the bottom left quater of the button. The rest of the clickable area is out of the viewport space.

If the widget’s space is set to “Screen”, everything is fine, but I need to have the widget in world so I can hide it behind 3D objects. Does anyone have a clue, what to do here?

What engine version?