It seems when labyrinths, which exist for a long time, attach to adjacent labyrinths, they become situations with two magic crystals at the heart.
In such labyrinths, it seems the feeling of the labyrinth changes midway through it.
It seems that such a characteristic matches up with the Teleport Labyrinth.
Even though I say that, it seems that not all labyrinths with those characteristics have two magic crystals either.
It's only limited to being a possible problem.