Supplier Bank not reflecting in Unpaid invoices

Summary:

Supplier A, had a Remit to Supplier B at the site level.
This remit to Supplier association was end-dated on 3/27/2025.
New bank accounts were added to Supplier Site.
Now there are unpaid invoices with invoice date prior to 3/27/2025 which are still pulling the Remit to Supplier B Banks. It is not pulling the Bank accounts from the Supplier A1 Site into the Invoice payment installments ,even after the 'Update Unpaid Invoices' was selected when the banks were created.

Please help clarify on the below

1. The 'Update Unpaid Invoices' , should it update the entire set of unpaid invoices prior to the remit to Supplier B end-dated on 3/27/2025. Or it will update only the unpaid invoices after the remit to Supplier B end-dated was on 3/27/2025?