Azir Tower Aim Bug

[GAMEPLAY] Sorry, forgot it in the title.

Hello, in my last game (04/17/2016, around 10 am) i playes Azir and used my passive on the 2nd midlane tower. The enemy Vayne ran into the tower and - now the bug - the tower aimed at her, didn't shoot, but aimed on her while she was out of range (she was at the enemy Chickens). The red line showed where Vayne was even if my team had no vision there. The tower didn't shoot, didn't aim at anyone/anything else until it got destroyed. I don't know how to take screenshots/watch the replay again, but maybe someone of you can look it up. It was at the end of the game (like the last 5min) or so.