Skarner stun + Iceborn Gauntlet
With the new Skarner update his stun is now placed on his E instead of his passive. With this I found if you build and Iceborn Gauntlet and have your E hit someone when you go to auto attack the target the iceborn gauntlet will occasionally use the sheen proc but not stun thus causing 1 empowered sheen auto and 1 stun auto. While it wasn't much of an issue it is a bit off.