Bug When Entering ARAM (Client)

This has happened multiple times to me on both of my accounts (xMidgetmanx and SensationalTaco). I enter the matchmaking for ARAM and when I hit accept to join the game, it does the normal sound of entering but there is a black screen. There is no crash, I can access my friends and chat, but I can't do anything else. The only way to fix it is to close the window and start up League again. But because I leave I keep getting banned. Please fix this as I am currently banned on both accounts. Thanks.