RNI - Purchase Order Returns Best Practice

Our teams are currently encountering an issue where we have POs with items that are received and paid for, but then are later returned with credit invoices matched against them (we have instances where this occurs for both full and partial credit matches). There is no
expectation of another item coming for the order (there is no expectation of a re-bill/replacement), and the PO header & lines are in a Closed status as well as the Invoice Close Tolerance Percent on the Lines' Schedules tab reflects 100. However, due to the fact that the PO Life Cycle
displays a pending Open to Invoice amount of the PO header total, it remains on a Received Not Invoiced (RNI) report.