Invoice Validation does not remove Supplier Holds

We currently use release 12.1.3 of Oracle eBusiness Suite and are facing quite a few problems with Invoice Validation. One such issue is that the Invoice Validation program does not remove Supplier hold.

To elaborate on this point:

a. We decided to put a supplier on a payment hold " Hold all unvalidated invoices"

b. As and when invoices were entered and invoice validation concurrent program was run, the invoices were placed on "Supplier" hold

c. If we then remove the supplier from the payment hold and run the invoice validation

d. Our expectation was that the invoices, must be automatically removed from Supplier hold, when invoice validation is run, but somehow thats not the case.