Jhin W bug

I know it's not a major bug but it hapened to me a lot these past few days. There is a bug with Jhin ( not on the pbe ) where you can see your W's mark all the time on someone! It just stays there for the whole game and it doesnt go away even if you attack the target that's always marked. I tried everything but it just wouldnt go away. I know its not a game changer but i figured I should talk about it.