Orianna Invisible ball [Gameplay bug]

When i was just playing ranked i was using the Gothic skin, and about halfway through the game the ball would disappear when ever i would cast the Protect ability or if i would get out of range of the ball. Any time the ball was on it would go invisible. making it even harder for me to track and possibly the enemy team. I tried to recreate the bug in a custom but it did not re appear. but i did not try too extensively, i main this champion when i mid lane it is scary i don't want this to happen again in a ranked game.