I run a Bedrock Realm, and recently the world has not been saving properly.   When logging off and joining back, things players have build, mined, obtained, etc. are not saved. This has also happened to me. This bug doesn't only happen when leaving and joining the world; it also happens when traveling through nether portals. Anything in the nether doesn't save, like if I place a block in the nether and go back to it after traveling to the overworld. I can travel between the overworld and the nether as many times as I feel like, and it still will not save.   The Realm does save properly sometimes. When it doesn't save, I try to close the world, download the world and reupload it, and replace the world with a new one and upload the world we play on back to it, and sometimes it fixes the problem, sometimes it doesn't.   We don't play with a texture pack or behavior pack. The world is a survival world with cheats enabled. Experimental gameplay is on. This bug happens with Xbox One players, Pocket Edition players, and Windows 10 players.   This bug doesn't happen when I run the world normally, not using the Realm.