[Gameplay] Top Turret 2 did not fire a Volibear while attacking Sona.

In a blind pick game on Summonor's Rift earlier today, Volibear killed an enemy Riven while in range of the turret in question (Bottom most in lane) , and then chased the enemy Sona under same turret and attacked her with auto attacks for nearly 7 seconds w/o the turret firing on him even once; It just continued to kill minions.