Splitscreen is laggy after one round

I have over three hundred hours of this game I got it on launch day since then I have noticed whenever I play split-screen the second-round lags or if I restart the session twice, I get unplayable lag even on ultra-low settings my specs are

ryzen 5 5600g

rtx 3050 8GB

16gb ddr4 ram

play off an SSD that isn't the boot drive and has 500 GB of free space out of 1 TB