iProcurement Punchout: Suggested Buyer not populating on Requisition Lines

When returning a shopping cart from a specific external punchout supplier, the Suggested Buyer field is blank on the Requisition Lines

Note: Downstream PO AutoCreate does successfully find the active BPA and assign the buyer to the PO. The issue is strictly the Req Line defaulting during checkout.

This worked perfectly for the exact same supplier few months ago.

When querying the database for those historical working req lines, both the ITEM_ID and BLANKET_PO_HEADER_ID were NULL.

Because the ITEM_ID and BLANKET_PO_HEADER_ID were null on the historical working lines, it wasn't pulling from an internal item cross-reference or the BPA.