"Game is still in progress"

This would happen once in a while, but i would go in queue for TFT then i would accept the queue. After i would expect to be in game but instead the game doesnt load but the client says "game is still in progress." After this i would have to wait until the game finishes because there is no way for me to reconnect, even after i try relogging. This glitch sometimes happens in normal games too, i would have to reinstall after in order to play LOL again, ahh its super annoying having to wait 3 hours to reinstall. I don't understand why this is happening . Does anyone know how to fix this?>