If you switch airplane mode on and off it can happen. If you have airplane mode off when you're side loading content (so the information that you've added file

If you switch airplane mode on and off it can happen. If you have airplane mode off when you're side loading content (so the information that you've added files gets synced, you don't have to worry about it. The problem seems to be when things have changed in the cloud it doesn't check for new items you've loaded on the kindle first, and thinks something went wrong and deletes it.