Boss respawns shouldn't allow others to take your exclusive loot

I've seen this happen a few times, but let's say you invite people to help you out on a citadel. If you the host dies first, and the remaining players beat the boss, you have no choice but to respawn outside the room.

Your fragment, or whatever items that should be exclusive to you, can now be picked up by anybody regarldess of the loot allocation.

Needless to say, you should be very careful about inviting strangers into such content.