Weird permanent graphics glitch with context window

I went to go open up studio, and the context help window was randomly open. I tried to close it, which resulted it to freeze for a few seconds. And after it finally closed, I was left with a permanent graphics bug in the top left corner, where the window was.

It even shows up when in the script editor.

Have you tried to replicate this after the first timr it happened? May of just been a fluke.