Villagers Stop Moving And Trading on Realms

I play on a realm with a bunch of other people, and occasionally villagers will just stop moving, trading, connecting to work stations, and will do nothing. I have lost many villagers to this glitch and i dont know what causes it, i have gotten other people to try to trade with them, and they cant either. I have even gotten the realm owner to reload the realm, and the villagers are still glitched. A villager will be perfectly fine, and then all the sudden just stop moving and trading, making the villager basically dead. This is a really big glitch, as making trading halls becomes almost impossible