Zac bug

So basically what happened is that during a ranked game, I played against a Zac and this weird thing happened to me twice. In teamfights, I saw him literally come at me as if he had homeguards on, which is really odd, because I don't know of any Zac abilities which include him running really fast towards me and dealing damage. This happened in the same game I noticed Leona bugs while playing her. I mentioned them in the previous topic.