When fixing the first issue in https://www.tamriel-rebuilt.org/bugtracker/unseating-rilvin-dral-issues, I have accidentaly introduced a new issue - Dral is now disabled properly when you kill the Dral copy, however he's also disabled instantly once he dies if you follow the quest progress as most people will and confront him at Tel Thenim, meaning you can't loot him for his gear.