This server does not seem to have bookduping blocked as I'm able to create the books. I've done the book dupe several times on survival, but cannot for the life of me figure out how to get it to work on a survive. I've heard walking 200-300 blocks away saves the chunk or relogging saves the chunk. Neither are working and the books just stay how they were. I'm on 1.14.3. It works in singleplayer.