Jhin's bullets fired from ult were invisible [Gameplay]

I do not have a video of this occuring but when I was playing against an enemy Jhin who was ulting I could not see the bullets he was firing. I was taking damage but there were no animations associated with the damage. I was basically getting hit by invisible bullets. So far this has been a one time thing but I havent played against a jhin since the game that this occurred in.