On Begin Cursor Over only triggers if I click on the object? Yet On Click doesn't trigger anything

Easily lost two days on this. It wouldn’t be so bad, if

A Unreal had better documentation in general
B There would some more meaningful behavior … it took a while to actually describe the probem. This “on mouse hover” fires, when I click is just weird.
C There wouldn’t be so much other quirks all the time. Whenever I try something, I get lost in wrong assumptions and those stack on top of the issue I was trying to debug in the first place.

Thanks for sharing your solution.