I was spinning up Chrome while trying to move around a Firefox window to my other monitor. Crazy though I haven't seen issues like this on any OS in at least a decade
This happens to me sometimes, I am running pop_os. It hasn't been a particular window / program that does it, just seem to happen when something is thinking harder than usual. Then it goes away, I ynno, I'm not a screen scientist.
There's your problem, shit eats resources like a mofo.
Also stop using Chrome, stop giving it market share, Google is trying to DRM the whole Internet into using Chrome.
LibreWolf on desktop, Fennec on mobile, both support all your addons, too!