There is some weird flickering on this site when i'm moving my mouse around and as I'm writing this too.
Here are 2 screenshots, it's hard to capture, but elements disappear and appear.
(trying to open user menu)
I'm using Chrome and on a 4K resolution, when I make the window smaller, their is no problem. I never had this problem before, but I don't use this site that often. I don't have problems on any other sites and haven't made any changes on my PC recently.