Please see the attached video
Slow resizing panels in every project with different settings.
Glitch effect sometimes react on different AA preferences, but i still dont get it how to fix. Newest GPU driver are installed.
ah yes dragging UI stuff in Unreal engine is … 
my pc almost gets deleted when I drag a slider value and my pc is powerful
so my solution to that is, DON’T drag UI elements in unreal engine 