After me and 3 others defeated Richard, 2 of us were still at the loot area, the other two left. we got stuck at the loot and the doors closed where we couldnt exit. team mate came back in and restarted the battle while we were still stuck there. thankfully logging off and back on ported us back to the fast travel but i think it shouldnt lock you in the loot room or be able to start a new battle. we are also playing on a nitrado server.