[Client] Whole game re-downloads, crashes

This doesn't happen often but sometimes my client thinks I don't have league installed (I can only assume) and then re-downloads the entire game. It also crashes right after games, so I don't see the score board after clicking "victory" or "defeat" but rather, I have to relaunch the client. Also, if I click on ranked but then switch to aram, yet I don't click on a specific thing in the middle bar option then sometimes the client doesn't update what I choose and goes into the wrong game mode.