Sorry this happens to you. Happened to me too. Two possible solutions: 1. Get a fireteam in there or just DELETE those headless on spawn. Delaying or allowing the headless to teleport around can block other spawns and you'll lose the last spawn. 2. Run the LS on Expert difficulty but the same rules apply. Bungie won't fix this so you just have to keep trying if you want that gilding done. Whoever said below that this is not a bug is wrong, don't listen to them.