Azir's passive tower does not gain stacking damage with each shot.

Besides its health reducing over time... Isn't it supposed to be just like a normal turret if Azir is standing in range?

It has the same items as the normal turrets but it's damage doesn't change. Makes the turret fall off massively since it only ends up hitting for 100-150 dmg later on in the game.

EDIT: While on the subject of bugs, Another bug I haven't seen reported on Azir yet is his E through walls bug.

If he puts a soldier over a wall, if the soldier is too close to the wall his E will not get him over the wall even though the soldier is on the other side.