[GAMEPLAY] invisible Cassiopeia poison

I found a problem when facing a Cassiopeia where her pools of poison (her W) aren't visible. Granted that i have a colourblindness but switching between colourblind mode or not didn't fix the problem. It is a small bug in my opinion, but it gives a lot of unseen zone control to the enemy since i can't really dodge or play around something I can't see.

I'm sorry for my lack of proof for the matter (I didn't record the game) Greetings Itogisch