dynamically generated diablo II areas are made by assembling pre-generated jigsaw map squares with matching male/female connectors on their boundaries, each map square is already an existing component and often its been rotated before being added to the list of map tiles. One of those in river of flame happens to be a 'fake' hellforge that spawns without hephasto or the real hellforge and doesn't really have anything of note, its just a dead end
in the year 2026, i cannot believe blizzard did not update this to allow male/male map tile connections