Villagers and other Mods despawning

Villagers from villager run farms, cows, horses, and minecarts have all been despawing.

Villager from inside a fenced farm, well lit and no way in or out has disappeared twice.

Many cows from fenced in area, and horse tied to a fence post has also disappeared.

Minecarts running on tracks under farms have also been disappearing randomly.

 

Please help!