Nidalee spears were invisible [Gameplay]

Hi, in the game that me and my friends were just playing, we were against a jungle Nidalee. All of us noticed that when she would throw a spear, all we would see was the red outline of it flying through the air. This bug is almost gamebreaking, and made the game almost impossible to win. I have no idea how to reproduce this bug as this is the first time I have ever seen it. Please look into this, and possibly disable her until this problem gets fixed. Thank you for your time.