[Gameplay] Rammus delay when getting out of fog of war to fast

I don't know if it's only me but when i encounter an enemy rammus and he appear in powerball from a decent speed or anything, he appear really fast like i had a delay but it fix itself after a brief moment. How to reproduce : Step 1 : Pick any champion and someone pick Rammus enemy side Step 2: go in fog of war Step 3: Let rammus charge powerball and get movement speed item so he go over 600 movement speed Step 4: Watch him appear out of fog of war if he appear normally or delayed and faster than expected.

Everytime i see a Rammus appear i think i'm lagging but i ain't and it only happen with Rammus powerball ability on.