I killed all bosses last night except the last.
When I enter on my own, it ports me to the Guardian's Study which is near the last boss. The trash has re spawned which is NP.
When I invite people to my group and I re enter, it places us all at the beginning with all trash re spawned and all bosses alive.
So, what's the official word? Working as intended?
Seems a bit ridiculous to have to re-do the entire dungeon just to get to the last boss again.