Weird dots appear on window and window previews after I leave it for a while

[Syntaxium Error]

This issue seem to occur a couple months after I reinstalled Windows which makes groups of dots appear on the Window preview when you hover over them. It doesn't bother my workflow or anything but it gives me the quirks and makes me cringe when I look at it. I couldn't find a solution so if you could help I would appreciate it.

This is what it looks like when I hover on the preview

Edit: I'm not sure but this seems to occur to anything that uses Chrome like Discordapp and these webpages

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