[GAMEPLAY] Neeko's image on the minimap appears as a blank white square

I'm not sure how to reproduce this exactly, but.

After ganking our lane in a Normal Match ( the bottom lane), the enemy Neeko's circular image disappeared from the minimap and was replaced with a big white square instead.

The champions on their team: Neeko, Naut, Tristana, Vlad and Sylas. Champions on our team: Lulu, Kassidin, Khazix, Jax and Kalista.

The last champion that Neeko "pretended" to be before the bug occurred was Sylas.