Mords Ult bugged my game

My game was bugged with a mord mist as if i was ulted but it stayed like that for more than half of the game after the first time he ulted me, it was impossible to see anything and even worse trying to see what's going on in team fights, we lost because of it lol I tried dying it hopes it would fix itself, that didnt work, tried reconnecting the client, and that didn't work so please fix