[CLIENT] Skin swaps to Classic

I recently bought Fnatic Janna, but in almost every character select i have to choose the skin manually. If i forget it, then i have to play with the classic one. It's pretty annoying, to select the skin everytime i play her. I dont have any other skins for her.

A friend told me, that he experienced the same thing with Nasus. I only noticed this problem with Janna.