[Gameplay] Champion will randomly stop auto attacking

This occurred immediately before the patch last night once, and has happened to me 3 times in a recent Nunu game today after the patch.

It does not happen every game, and has occured on Turrets and Jungle Monsters. I have not noticed it happening on Minions or Champions (yet).

To reproduce bug, simply orbwalk while attacking. On completely random intervals, the champion will walk in range of the turret and stand there. Won't even draw auto attack in range targts automatically, as if you pressed S and are holding it down.

To fix, you must right click the target again. Unless the automatic targetting on Auto Attacks has been changed recently,

I do not believe this is a gameplay error. If I missed and clicked next to the target, MF would walk all the way up to the turret, not walk into auto attack range before stopping. If it was a button mashing error, I play Nunu. My Ring Finger wouldn't fat finger the S key while orbwalking because you don't use Nunu's snowball to clear (past rolling to the next camp and smashing it initially). In fact, it almost never happens while chaining abilities, it usually happens when I'm orbwalking only with autos.