Zyra's plants are taking valium.

I've noticed since a few patches ago that Zyra's plants are much less aggressive than they used to be, sometimes ignoring targets completely until they are attacked in melee even. And this isn't just when they already have a target, sometimes they simply just sit there and get attacked until they die or wither away. This is obviously very frustrating as there have been many times it has made a very large difference in game outcome. Please fix Zyra's plants.