Part Numbers Not Showing Up On The PO Form

I have many items in my database that have supplier part numbers attached. When I enter these part into a PO manually, the supplier part number and my part number both show up on the PO form.


However, I am having a problem when I create a PO using the Buyer Workbench. If there are supplier part numbers attached to the part, neither part number shows up on PO form when it is printed.

There is a workaround. If I manually go into the Part Cross Reference Options on each PO line and set the supplier part to print as the main part reference, then the part numbers show up correctly.

Any suggestions on how to make the part numbers show up automatically when I create a PO through the Buyer Workbench when a supplier part number is involved?