Once enter the second room, Player is unable to return to the previous room.
Player will not be teleported out of the map if dies in this room.
Party member that disconnect can't enter the second room directly, the raid from the first room will respawn and need to defeat again to enter the second room again. Thus best to avoid disconnection in second room.
Fanglonmon has 10 minutes time limit to defeat, every party member will be killed by its One hit KO skill when reached the time limit regardless of Player's Digimon HP.