Visual bugs in-game patch 6.18

Hello rito! I just downloaded the new patch (6.18) and I've experienced some severe in-game visual bugs while playing on the same team as the new yorick, my top laner. It mostly consists of odd particles and "green screens" sticking to my champ and other objects, such as torches and other champs. It is disruptful to gameplay as it covers parts of the map and characters. I've talked with other players, and they've assured me that I'm not the only one. Thanks for looking into this :)