Weird bot behavior in recent games

I played a few games for the first time in a bit tonight. I'm not clear if it's only games where players are botting/scripting the "run up the middle and repeatedly die" deal or all bot games.

The enemy bots were stutter-stepping in place on a regular basis, not auto-attacking, and not running away at low health. It might have had something to do with minion collision ranges, as they mostly seemed to moonwalk/jitterbug around the minions?