FPS drops after kill cam/tabbing out

Does anybody have massive fps drops as of late upon some random interactions with game menus/tabbing out(specifically using windows button)/anything else? Literally started to happen to me just today. Should I be concerned about my hardware? Sometimes it randomly goes from 250 down to 20, then it is fixed on its own after loading into other map or something. Doesn’t look like consequences of overheating to me.
Last time I checked, GPU temp was at 66, hot spot at 82, which seems acceptable.