So I jumped in a game of PoE (level 28) and we got though the whole thing pretty easy. At the very end after we killed the final boss I was celebrating with my friend. We fired off rockets and then we started sniping at each other. I was sniping him from down the hall (he was already in the Airlock) and all of the sudden the door closed and I couldn't get in to the airlock. Since I was just trapped there I decided to kill myself and see if I could respawn in the airlock. I didn't. So I didn't get any loot from the treasure room. I was just stuck there. I could care less about the loot, it was only level 28 and I didn't even have a treasure key, it was just the feeling I got. I had just done all that work and didn't even get to go to the treasure room. It made me really sad. That is all.
Variks even says stragglers won't be tolerated. Better luck next time, hope you can read.
Never leave a dead player in a zone. It bugs out and they have to leave and rejoin or the whole group has to wipe for everyone to respawn and the continue.