Me and my friend were playing on his world when he accidentally pulled out the plug that powered the xbox, The world was fine when we were on and we had just slept but when we joined back there were chunks missing in the world that went from about y level 60 and broke through bedrock. I also had lost everything that was on me and parts of the world had lost data even from yesterday like our ores, our villager farm and mine and my friend's buildings. Some of the world was okay but my friend had lost some items from his inventory.

I don't know if this happened because his xbox got unplugged and lost some data or if it's just a weird glitch that I've never seen before. 

I'm on pc and my friends were on xbox so I don't know if that could affect anything.