This bug is happening when I'm running my server that me and my friend play on. The bug causes all our cows, chickens, sheep, pigs, and villagers to disapear. I dont know much about coding but something shows up saying "failure to dublicate" or something like that. Im sure you will fix this, thanks.
Environment
Im running on Windows 8 and java 8.
Please attach the server.log.
Most likely MC-82945