Azir Soldier auto "attack" bug

I first noticed this the other night watching Bjergsen stream. He kept saying something about soldiers auto-attacking, but I didn't realize what he was talking about until today.

My last few games playing Azir, I've noticed this myself. When you summon your soldiers, every once in a while one of them (and usually only one) will auto "attack" targets without the command. The reason I say "attack" is because the full animation occurs, and will even switch targets if one is in range, yet no damage is dealt. Additionally, if the soldier begins his animation, you have to wait for it to finish before your attack command will register (and consequently deal damage).

While not absolutely detrimental to the game as a whole, it does make it quite annoying to try to CS with Azir when this bug shows it's head.

I'm not sure if this occurs on ARAM or Dominion, but I know I've seen it at least 2-3 times per game on Summoner's Rift.