Something is off about Heimerdinger's turret AI recently...
The enemy champion didn't get in range, so it has nothing to do with prioritizing them. I used to constantly have 90%~ success CSing as Heimerdinger. Between the high turret AS and my own AA I was able to last hit almost perfectly.
Recently the turrets are just going insane. They are ignoring the targets I mark with my AA and they randomly switch targets. It's not uncommon for them to get a minion to 1 hit from death and then change targets. It's easily replicated, it happens in every game I play him. The most catastrophic part of this bug though, is that you can have an enemy dive you and your turrets will ignore them. I can mark them with my AA all I want, and they're in range, but sometimes a turret won't focus on the enemy.
Has anyone else noticed this issue? I've played plenty of Hiemerdinger over the past several months and have just noticed it this past month or so.