[GAMEPLAY] Cassiopeia invisible poison

Yesterday i encountered a bug with , my mid-laner was saying that the W from enemy wasn't visible although the animation was visible (the one when she trows it).

How to encounter it:

1. let the enemy trow her W on the ground and watch the animation of the spell where it lands.
2. try to walk trough it and you will see no poll but you will get damage and will get slowed.
3. get annoyed as hell because you die in a team fight because you can't see her w :).

anyway i hope this bug will get fixed soon,

Thanks in advance,

rupie10(euw)