Jhin Ghost

Earlier I was playing a game as Mordekaiser (huehuehuehue), and, as you can probably tell from the title, the opposing team had a Jhin . I got fairly fed as Mordekaiser and almost instantly burst the enemy Jhin after putting my ultimate on him. However, when he died he only had one shot left from his passive (the guaranteed critical) and the ghost only had that one shot, but would continually fire it off without reloading and each shot continued to inflict the critical damage. I sincerely doubt this is intentional and was wondering if anyone else had encountered something similar (I haven't had the chance to try to replicate it yet).