[Gameplay] Kayle self-ulting results into 'teleportation'

On Kayle, on occasion it has happened that when I ult myself, sometimes it shows the casting animation but my character model from my perspective is standing still even though I'm moving during the duration of my ult. After the ult ends (the swords come down) it will 'teleport' me to the position where I'm supposed to be. After the game I rewatched the moment it happened but from that perspective it was working normally. It has happened to me approximatly 3 times. Sadly enough I couldn't record it happening during the game and I also couldn't reproduce what happened.

Basically: ult self, move to a direction but from my pov it appears I'm standing still, after ult ends I teleport to where I was supposed to be.