Game crash

Game crashed unexpectedly, with no warning and no reason that I could see. The odd part is that when I attempted to login and rejoin the game it immediately says that my username or password is invalid. I check and can login with no issues to the website and forums. I checked that I am on the correct server (North America) and continue to try to login. Eventually I switch servers to EU and then back to NA and all the sudden can login again. Not sure what caused this but it was frustrating and caused me to lose a ranked game and be reported for AFK behavior. Normally if the game crashes I can be logged back in and playing again in 2 minutes but this issue took me about 30 minutes to figure out and solve. On top of this I can't play without waiting 20 minutes and my teammates suffered a loss due to something completely out of my control. It's very frustrating to have issues like this in a game so popular.