Recently, due to my issue I had on my PC, I have started playing on my Xbox One copy of Minecraft. I decided to load one of my worlds I created in the Minecraft Beta on my Xbox. When the world finished loading, I was falling out of the world. When I respawned, I was falling out of the world again. I looked behind me and saw that almost all of my base has disappeared. I keep falling out of the world until night time had come. Then, I managed to get in my bed, setting my spawnpoint on the bed and looked around the world and saw that seemingly random chunks have entirely disappeared. After I got off the island that was my base now, I went to the nearby village to see how that was effected. The village seemed to suffer from the same problem. After some investigation, I noticed that all the chunks I had interacted with (breaking and placing blocks and opening ) had disappeared. However, the blocks I placed stayed. I know this because my chests, bed, and furnaces stayed but the mountain I started builded my base in was gone. Along with that, the chunks that the planters that I borrowed crops from in the village and the blacksmith chest I looted had disappeared. Even worse is that it's a no cheats world, and since it's my achievements world, I can't turn on cheats to fix it. If there's any way I can fix this without cheats, please tell me.