Heimerdinger Turret Visual Bug

Last night I was playing as Heimerdinger in a bot match and I noticed that one of my turrets was attacking an enemy champion outside its range with basic shots. The shots weren't doing any damage but the turret continued firing until the champ was out of view.

Later, I played against a Heimerdinger as Swain and the same bug occurred. Doing no damage, as I was able to recall as it was shooting me outside its range.