I run the latest spigot server, and a couple of self made plugins. But sometimes when I restart the server some villagers disappear... like all the villagers (and iron golem) in a village, or in another example (happend now 2 times already) villagers that I keep at my zombie farm. the villagers can not walk away. Is there a way to fix this, I now just respawn the villagers using the /summon command. Thank you