I've now experienced this with a modpack that had Mo'Creatures, since deleted, and now in a new game where I never used Mo'Creatures or CMS. Can anyone help diagnose this?

The first village I encountered has about 200 villagers in it... it's completely overrun. I'm not sure what is causing this, at all, except that it has to be an interaction with another mod or everyone would have reported this.

Here's my modlist.