Nunu Bug?

Hey there guys, I was testing out Nunu today for the first time and I realized that there seems to be a bug with his snowball. If the game happens to end while you are still rolling your snowball, you can actually still control your movement even in the victory screen. What's even weirder is that once the duration ends (or you hit a wall or something) your character model will actually start bugging out (i.e. blinking around, going invisible for a few frames, etc.). Unfortunately I don't think I can capture any footage of this bug, but it is very easy to reproduce (you just have to play a custom game and start rolling as minions are ending it). Please check this out!