game play, Vel'Koz is glitched

Hello, I've just discovered that Ve'Koz is glitched. After I did an auto-attack it froze, same thing happened casting q and w, the champion freezes, however you can keep playing and casting spells, but its creepy.

1. After I Auto-attacked a minion, vel'Koz froze, but continued attacking
2. After casting q, vel'koz froze, but continued auto-attacking.
3. After casting w, Vel'koz froze, but continued auto-attacking.

This happened during 1 game, I haven´t played vel'koz anymore because of the glitch.