Zyra plant AI
I play Zyra quite a lot both mid and support and to me it seems like the plant targeting is so unpredictable.
E.g. when you QW poke a champion then autoattack the champion the first plant shot hits the champion but often the second shot will randomly hit another target in range (even if the champion is still in range).
Also plants sometimes switch aggro from champion to minion even when continuously autoattacking said champion and the champion is in range.
Also the targeting is quite slow, when spawning a QW plant in an area without minions but a champion nearby the plant seems to hesitate before finally acquiring the only target in the area. When poking this way versus adcs they usually kill the plant without receiving damage at all. A smart player can even abuse the slow targeting by stepping in and out of range of the plant.
The plants are also happily shooting minions while other champions (in range) get aggro on Zyra. Perhaps as a balancing tool but I feel Zyra would be a bit safer if plants would stop prioritizing minions when a champion has aggro on you.