Minecraft wiki entry for Block_and_item_duplication, associated text: If any of these do get patched, you must either go back versions or use third-party applications in order to replicate them again. For Java Edition, this can happen in the Minecraft Launcher, but on Bedrock Edition, you must use third party applications in order to replicate these again. These third-party applications are NOT owned or endorsed by Mojang, so use at your own risk.