Whenever I try to export a world, it creates the .mcworld file but does not contain any data (0KB file size). This also may have glitched my world making any guests that previously played have to start from spawn over again. I was able to recreate this by trying to export the world, then load the world and have the guest players join. I also noticed when I initially opened the world, I was also reset to spawn. However, I exited the world and closed minecraft bedrock, re-opened the launcher, and then loaded the world again, and I was returned to my correct state. I was not able to recreate this error with myself, the host player.