Mastery=Crash?

So bought mastery 6 Ahri, the animation crashes my client, everytime i reload the client, animation starts, byebye client, cant even play anymore. Literally just end up sitting there looking at a blurry, frozen mastery 6 sign. just tryna play league again yo

step 1: buy ahri Step 2: grind mastery Step 3: grind games for S strep 4: grind ip for blue ess step 5: get mastery 6 and crash client everytime