Xboxone S boots very slowly or not at all

My "home" xbox is an xbox one S that sits in my bedroom while my X occupies my family room. I have my live account and a couple of my kids accounts on both xbox. The idea being that they can play on the "home" xbox without my account signed in while I'm playing on the X.

For several months, at least twice per month, the S won't boot. I'm able to get to the recovery console and delete the accounts/reset without deleting the games and everything will work fine for a few weeks before it happens again.

The box is connected via wifi and I have a mesh (netgear Orbi) so signal strength isn't really an issue.

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Any ideas about cause and a more perm remedy?