Level 5 mastery crash

I received a level 5 mastery on Jax, once the game finished It started to show the animation of going from level 4 to 5 however the animation does not finish and my client crashes. This happens every time I start the launcher

Steps.

1. Have a champion level 4 with 1 win making it level 5
2. Win a game
3. Finish Game
4. Have Animation for level 5 appear