After the 3/27 patch (the one that introduced the SAB, though I doubt it's due to the SAB), I started having fps problems. My fps is fine when I first start the game (around 40 fps, which is good enough for me) but then gradually drops down to about 10 fps after playing it for around 10-20 minutes. What's funny is that, once my fps drops, I can change my power settings and the fps will go back up to around 40 again. It doesn't really matter what power setting I use (unless I'm using the battery saving setting): simply adjusting the power setting in any way, from lower to higher or vice versa, will make my fps go back up. Then in around 5-10 minutes it will drop again. My CPU is an Intel i7-7660U, and my GPU is an Intel Iris Plus Graphics 640. Any idea what might be going on?