I have been able to verify, if you move away from the structures from which you fall from your base or from any player, until they disappear and you return to them on your steps, said structures will reload and this time you do not fall, that is to say that it seems to be a problem with the physics of the game that restarts every so often and that first generates the character and then the structures, roof, foundations, etc., which is why when the character appears the ceilings do not yet exist and that is why you fall, due to the physics of the game .