My Kindle app has been consistently losing my spot. It keeps my bookmark so I've yet to truly lose my place, but its annoying as hell. I am a natural troubleshooter and I've yet to work out any specific circumstances. Last night I was reading before bed and I got to a new chapter. I set a bookmark and hit the sleep button and put my iPad down. 15 minutes ago I went to pick it up and it was on page 18. I hit refresh manually and it said I was that the farthest synced location across all devices. I load up my bookmarks and sure enough there's a bookmark on page 27, which is where I was. Its not just one book either. It was doing the same thing on the last book I read. Both Kindle books purchased from Amazon.