The building completed yesterday, the next day MCPE Automatically log out my Microsoft account for no reason,Yesterday's archive also changed back to the beginning, I'm sure I've saved it safely

Is this only happening on a Dedicated Server, Featured Server, realms, multiplayer or singleplayer? What plaform/device are you using?
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Cleaning up old tickets: This ticket had been set to 'Awaiting Response', but has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.

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