I think this might be a bug. In a new game, I came across a horde of over 200 fungaloids near a mansion. I think the spawning scale might be off. Also, the issue with them instantly growing is very present. I tossed an incendiary grenade into the thick of the horde, and they all burst into flames and died; however, there was just more and more fungaloids. They kept fleeing the fire, and the ones that died were replaced by more. They kept multiplying, and they moved towards the mansion and burned it, and the whole forest, to the ground. I think this needs to be addressed. I would have taken a screenshot, but I have no idea how…