[GAMEPLAY] Camera keeps moving in one direction after i want it to stop

So I hate how you have to mouse over to the edge of the screen to move the camera, so I bound camera movement to w,a,s,d accordingly, and up until the poro king patch it worked fine. But now if I push w and d at the same time to scroll up the lane the camera continues off either straight up or straight right after I let go of the keys. Same with s and a going straight left or straight down. The only way to cancel the unwanted camera movement is to push the button that makes the camera go in the same direction it won't stop going. This happens 100% of the time, but it only happens when you push two keys at the exact same time. If you hold one key down and push/hold another a second later it wont do it. But this is still frustrating and makes the game difficult to play. I've checked every option in the in-game settings and can't find anything that affects it. I've reset to defaults and rebound all the keys. I haven't changed any settings before this started happening and if I open chat and push two keys at once, it wont type aaaaaaaaa or wwwwwwwwww etc. so I'm positive it has nothing to do with my keyboard. I've also restarted league and my computer a number of times and still no dice. Any help would be much appreciated, thanks in advance.