Your issue is with Epic rather than MS because it's Epic's game.
This is just a theory but reading the various complaints about this glitch leads me to believe this is just the same glitch that afflicted Gears 2. As such I'm suggesting that to avoid the glitch you would need to use the same method that worked in Gears 2
ie always exiting back to the main menu of the game before powering down or dashboarding.
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