Auto-deleting fields when updating supplier on duplicated PO

When updating the supplier on a duplicated PO, additional fields are cleared: supplier site, communication method, communication email, bill-to location, and Default Ship-to are not retained.  While the Supplier Site, contact, and communication method make sense, I think the bill-to location and Default ship-to would not be changing. The order did not have an agreement.  Is there currently anything out there right now as a known issue?  Is there a functionality or a way to retain those fields?