Purchase order need to be re-confirmed


I'm using AX2012 R3 CU9.

I'm having an issue in PO that needs to be re-confirmed after receiving the item.


1.  Create a purchase requisition that passes thru approval workflow

2.  Once PR is approved, I created the PO under Procurement and Sourcing>>Common>>Purchase requisition>>Release approved purchase requisition

3.  Confirm the PO

4.  Receive the PO thru item arrival under Inventory>>Journals>>item arrival>>item arrival and generated product receipt

5.  When invoicing the PO, cannot invoice because the PO status become Approved and no longer confirmed.

Is this a bug?  This happen on selected PO only.

We don't have approval workflow in Purchase Order.

Please help.