So I'm using the Factorio world mod ( https://mods.factorio.com/mod/factorio-world ) and have noticed that for some odd reasons the belt elevator don't seem to work at all. when I place a stairs, it works. but when I place a belt elevator, there is no corresponding belt that gets placed underground. also when I try to load stuff onto the belt nothing seems to happen. my best guess is that the mod gets tripped up by any other mod that influences terrain generation.