Mordekaiser tower hits ghost everytime

When you get mordekaiser ult on someone and your ghost approches the tower, now once the tower kills any minion it will directly hit the ghost. treating it like its the next big minion. even though its a champ and shouldn't be targeted? please fix this like it use to be where you can either choose it to be targeted by the tower or using the ghost as a secondary champion to take down the turret