I just exhausted an allied illaoi ghost thing on accident

i tried exhausting a yasuo who ulted me in a teamfight and i accidentally hit the illaoi ghost thing behind him. there is never a scenario where ulting the ghost thing is ok. it doesnt deal damage and it doesnt move. this is like one of those things where u used to be able to heal a minion as soraka and soraka players would accidentally heal it instead of their ally and then they would die.

i won the game anyways but plz rito fix this