I had a chestplate for about a week sitting in a chest with unbreaking 3 and thorns 1 on it, ad i was waiting to get mending so i can put that on it. I put mending on it and my shield and start flying back from the end, going to the portal so I can go home. Then, the wind causes the power to go out for maybe 3 seconds,. I load MC back up and i have my shield, the mending book, but don't have my chestplate.