I've got a base technically 90% Plains and a small sliver of 10% Meadows biome and I get this type of interaction every time I visit the base. And I keep a paddox of Lox on the Plains side of the base, every night I'm there are NPC battles and each morning I go clean up the loot....the nearby Fuling village I raided some time ago is leveled but I get up to about 3 Fuling groupings spawning regularly in range of this base.