So since I've updated to 1.13 on Minecraft Bedrock I've had this really weird bug where some random floating blocks have just been appearing in my survival world. Sometimes they go away after a few real life days. This bug seems to be biome specific too because the blocks change whether you are in a birch forest or in a plains biome. I also had one where it was floating torches and grass. I have no idea if anyone else has had this bug.