fps issues after patch 9.2 so obnoxious

so after the latest patch im having huge fps issues normally i played with 80-100 fps whole game and now after 5-10 mins the fps drops down to 30-35 and stays like this untill i alt tab it, after alt tabing after 1 minute it goes back to 30 fps and i have to alt tab again its so obnoxious and this needs a fix asap