UMG On Paint glitch when drawing 4 or more lines

Unreal Engine Programming & Scripting Blueprint
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#1

So im having an issue with on paint everything works fine until I draw 4 or more lines and then I get this problem

at the top and the left of the screen it will flash white

and if anything moves over that area it will stick? to it in a glitchy windows xp style

#2

I got the same problem and reported a bug for it here:

Short answer: Will be fixed in 4.8.2 :slight_smile: