I was playing my own custom-made modpack and it was normal, I messed around with the config a little bit to have more fun, and one time, suddenly, when I came back from doing something in-game, and all the villagers nearby have their legs missing. I quit the game and went back in the world and it didn't work.

Config: Pastebin

Screenshot of missing legs:

Please use the proper issue format. This is going to be an issue with some of the other mods you have in the pack and not a fault in MCA.