If Aatrox uses a potion before his passive pops, the potion disappears during the stasis.
This bug happened to me while I was laning top. I knew my passive was going to pop during a trade, so I used a potion before I went into stasis. This way I would have a chance to regain life when I came back out of the stasis, but instead when I emerged from my passive, my potion has disappeared and I didn't gain any of the health it would've otherwise given me. It's pretty crippling to lose a pot to a bug like this early game; A fix would be much appreciated.