who have the freeze with yasuo?

whenever i play ARAM on yasuo and i ult an enemy. my client freezes. happening since months ago.

at start match you have a freeze?

I also have this problem, especially on Legend of the Poro King and when I'm using Project. Just freezes and I have to restart my computer to do ANYTHING, can't tab out or use my pc at all, can only hear the ambience at the start of the game.

i have problem with all skin but is the problem the riot?