Supplier hold release from Invoice validation request

Hi

We have set a supplier hold (hold all unvalidated invoices)

The invoice go on supplier hold on validation

We remove the hold after one month.

The invoices are not picked up and supplier holds are not released on the next run on invoice validation request.

The holds are release on manual invoice validation from Invoice workbench

Is this the standard functionality in Release 12 also

Also what holds does Invoice validation not release

Thanks

Ninad