Plot Double Update on Text Draw
I couldn't find this behavior mentioned yet, my apologies if it has already been addressed. Currently running gnome-system-monitor 3.36.1 in Ubuntu 20.04 lts.
All plots appear to lurch forward an extra tick everytime the text fields update (by default every second or so). The plots appear to be drawn twice during that text update tic (once normally, once triggered by the text update).
Because of this double update, the plots feel like a heartbeat with a 1 second rhythm and is hard to un-see once you see it. I can attach a recording of this behavior if it does not become obvious/reproducible in your environment.