Scout disappeared from SB roster

We are a new pack and I I am the cc. I recently accepted 12 transfers from another pack in the same council, and all of them came over correctly, but I have a problem with one, BSA number 14750486. I accepted his transfer, and then tried to add him to a den, But then received an error that he is not a member of this group. Then he disappeared from the roster

This scout has just simply disappeared From the roster Scout book But he does appear in the roster on my.scouting

Thank you

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Thank you!)

@PaulCraig1 I setup an overnight Sync to bring scout back - some action you took moved the scout out - the audit data does not detail the action