
@Ken Stewart , Thanks for the clarification.
That would be the expected behavior if you are referring to users in Person or Groups columns. The cleaning process for deleted users by SharePoint does not include column values, you will need to remove the receipts manually.
Consider the column values as site contents, which does not get touched or automatically modified by system. This situation applies to columns like Modified By/Created By as well.
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UPDATE:
If you are using the built-in "Shared With" column, this is a known issue in SharePoint Online that "Shared With" column does not update and remove the deleted users. It is recommended to hide the column and use the Manage Access panel to determine the sharing status instead.
Please see the reference here: The "Shared With" column displays users who no longer have access to a document in SharePoint Online.