Why Business Object Type parameter works different for Audit Policies as product compared to others

When generating Oracle audit reports for a Product (e.g. Payables) the drop-down for "Business Object Type" does not appear to limit the report output if left "blank," since no selection seems equivalent to selecting "All." Conversely, Business Object Type does not behave the same for the Product "Audit Policies"; when leaving Business Object Type blank, the report output always shows "no data." Only after selecting a Business Object Type (e.g. Oracle Fusion Business Objects and Attributes) does data actually populate. Can someone from Oracle please confirm that this Business Object Type behavior is only limited to the Audit Policies product?