League Crashes

While in queue of waiting to join a game, when it goes to take me to champion select instead it glitches out. It returns me to the screen showing the lobby setup where i invite people. Its happened to me about 15 times in the past week. I just want to know if this has happened to anyone else or is it my computer? If it isn't my computer can you see if its fixable because it gets annoying having to wait 15-30 minutes to play a game because i end up having to dodge. Thanks much appreciated.