Unable to update Manager in Status and Hierarchy for two associates

Summary:

I have two associates who need their manager updated in Merit because of a late manager change after our cycle was opened. When i go in to change the manager through Administer Workers, the manager's name is not appearing (this is the same behavior for both associate's whose manager's im trying to update). Both managers are active so im not sure why this isnt working. I've been successful with updating the manager for other associates, but the associate below and one other associate the manager just isnt found.

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