Zyra Plants Harder to Zone With [GAMEPLAY]

I find Zyra's plants to be more difficult to zone with after patch 5.18. The problem is that Zyra's plants prioritize whatever I have last SUCCESSFULLY auto attacked. This means if they lose target on an enemy champ and I auto attack a minion they won't retarget the champion unless I land an auto on them. Before you just had to right click the enemy, you didn't need to get the attack off, and your plants would switch targets.

Patch 5.18 makes zoning a lot more difficult as I have to run up to the enemy champion and auto attack them each time they run out of range of my plants. That's a dangerous thing to do for slow squishy Zyra. This could be an intended change but it wasn't in the patch notes. I would like to see the plants always prioritize champs within their attack range or prioritize what I have last right clicked, not just what I have last auto attacked.