There's bug about UMG UI

I’m using ue 4.16 and following a link https://docs.unrealengine.com/latest/INT/Engine/UMG/QuickStart/3/index.html the Hovered style doesn’t works when i pressed play and drag cursor on the mainmenu the hovered color doesn’t appears
and next things is https://docs.unrealengine.com/latest/INT/Engine/UMG/QuickStart/4/index.html i did the same thing but when i pressed start button, the start button didn’t remove from the screen please check and update thank you.

As i searched for the solution about this it has been issued.If there’s anything solution please let me know

Someone please help me