Sion and Yorick glitch

Hey guys!

Giraffiti0 here with my first post on the boards. I played sion for the first time yesterday with a Yorick support in a normals game. Later in the game I noticed that every time Yorick used his ult on me not only would I not come back for a few seconds after death, but his ult would cancel my passive so that when I was killed, that was it. I was just dead. Just wanted to know if this has been happening to others/wanted to point out a potential glitch. Thanks guys!