Why won't the supplier site field default on PO-matched invoices?

Summary:

Supplier site field is failing to default on PO-matched invoices.

Content (please ensure you mask any confidential information):

The Supplier Site field is populated automatically when a supplier is assigned to a non-matched invoice. However, when matching an invoice to a PO, the Supplier field populates automatically yet the Supplier Site field does not. I must then manually select the supplier site from the drop-down list. Why is this automation removed for my PO-matched invoices? Is there a configuration to activate this?

Version (include the version you are using, if applicable):

24C (11.13.24.07.0)

Code Snippet (add any code snippets that support your topic, if applicable):