I run rocket league on steam fullscreen and don't want to run it borderless because of input delay, but my game constantly alt tabs itself. The screen will turn black for a second and then alt tab and when I click back on the game there's the symbol of lag spiking. Other issues I have had is when it does this alt tabbing the game just freezes and I cant ctrl + alt + del or anything just have to restart pc. Not sure if it is actually the internet causing it but I have ran tests using malwarebites and have found no threats or anything.