Zac Passive bug

So While playing a game as Corki mid we got into a dragon fight later on in the game and we kill the enemy Zac and trigger his passive, but he immediately responded as full hp Zac and his passive blobs were still on the ground and then after we killed him, he had to be killed again once his blobs reached his body again. I do no have a video of it but Riot can check my games and see it right?