Contact not showing on requisitions

Hi

When crating Purchase requisition, we have problems with some of our suppliers.

When entering in the bottom of the screen the below information:

• source: Supplier
• supplier: MR SUPPLIER
• Site: THE SITE
• Contact: ????

If we clic on the LOV, it finds no contact.

If I look at the supplier, it has 6 contact. Why can't I see them in the requisition window?

Thanks!