Mordekaiser Bug

Whilst playing Mordekaiser I managed to defeat a wild Jhin, but upon enslaving Jhins soul with the ability Children of the grave I could use Jhins final round unlimited times, no reload animation, Jhin would simply fire his final shot and it would be back up again to which he'd fire another final shot meaning every shot was always a critical strike because the red bar displaying Jhin was shooting his last bullet would always be up. i don't believe this was made intentionally so I am just reporting a bug I have experienced that in my opinion was defiantly broken