YASUO ULT BUG/GLITCH

There is a bug happening in game whenever i play yasuo its annoying when im in ranked because it causes my game to stop responding. so this is how it happens.

1. i get ready to ult with tornado
2. i launch my tornado and spam r (very skillful)
3. my ult animation starts and then stops mid animation while im still in the air and the game freezes then stops responding.
4. i cry while i shut down my computer and reload into the game why