With the new game rule that is able to have one player sleeps on my Minecraft bedrock realm, it works perfect when I type the command in the chat. But as soon as no-one is on the server the command resets back to normal and everyone has to sleep.

I would like to add, my world is legit with no cheats on. So a command block is not in the equation. I've also asked command block experts and they said it could be a bug and to report it, so here I am.