Multiplayer server: 4 of 8 villagers in a village that were spawned after discovering the village have stopped moving entirely. they are all librarians, they can look around, make noises and trade is still possible. However they are rooted to the ground, and won't go inside at night nor will they run from hostile mobs. I can nudge them around, but that's it. I tried breaking their job blocks and beds and replacing them but to no avail.