Shaco clone ignoring tower agro (not sure if intended)

Alright so clone work in a weird way with towers. The clone attract tower ago on the real shaco if it hit you. The wierd part come when shaco isn't under the tower and send his clone to attack you while there are minions under the tower, in which case the clone will never actually drag tower agro on himself (pretty sure he is the last thing the tower will focus too).

So i think the interaction might be a bug because of how it basiqually remove a part of counterplay from the game, but i would like to know what it really is about and if it should stay in your opinion.