[Gameplay] Yorick Invicible Minion

I was playing an aram game and they had a Yorick on their team. About 15 minutes in, something happened that persisted the entire game. Whenever said Yorick died, in his place would be one of his slowing minions. It acted exactly like his normal one except it didn't attack and had 0 health. Even with no health, it would follow us around and slow us. It would also make it so our minions couldn't advance, thus making it close to impossible to win. I, along with many others, I'm sure, would like this bug to be fixed ASAP.