Champ Select Bug [CRASH]

First I selected Trist. As you can see form the picture, Trist is not seen as my "icon" to the left side of the sceen, but I did not notice it until later when the pop up "Retrieving data..." showed up. The pop up occurred after I have changed my runes and mastery.

The resulting screen is shown in the picture. Please note that the client did not crash when I was selecting champion. It only crashed after I have changed my runes and mastery.

The client then would not proceed to load the game but remain frozen like that. It can only be resolved by force quitting the client and restarting it.