Azir auto-attack with soldier bug

Sometimes, very rarely (about once or two per game), I'll raise my soldiers and when I auto attack it won't make the animation but I'll hear the sound---the damage doesn't apply either. I'm not really sure how to explain it better. Like when I'm trying to attack a champion or a minion with the soldiers, the soldiers won't do anything and no damage is applied but the sound of them hitting the minions with their spears comes up. It'll stay that way until the soldier disappears and I raise another soldier. Like I said it's rare, but I figured it would be something to look into. I haven't died because of it, but seemed more of an inconvenience especially if it were to happen during a team fight.