I dont know if its chunks reloading when the game is restarted. Some of the animals we had where very close to each other, or even in the middle of the chunk, yet they were still disappearing from the leads. The pig and the iron golem where only about 10 blocks away from each other at most, and they still both vanished at different times. The host of the world also doesnt have many crashes, and thats not when we notice the disappearences.
I dont know if its chunks reloading when the game is restarted. Some of the animals we had where very close to each other, or even in the middle of the chunk, yet they were still disappearing from the leads. The pig and the iron golem where only about 10 blocks away from each other at most, and they still both vanished at different times. The host of the world also doesnt have many crashes, and thats not when we notice the disappearences.