When I opened my Minecraft world an entire chunk of the world had just deleted. Everything that was on said chunk like my animals, chests, and entire house system were gone, the entire chat filled up with my named dogs deaths followed by "fell out of the world." I don't know what to do this has happened twice now, and I can't get anything back, I've restarted my computer, restarted Minecraft, even copied the world and reloaded it. I would really appreciate for this to be fixed