Why does the quantity received get updated on the Purchase order when there is no Receipt created i.e Invoice is matched to PO only and there is no system receipt created? This is for Ebusiness suite 12.1.3
Ideally, if nothing is received for a PO, 2-way matching or 3- 4-way, quantity received on the PO shipment should not be updated.
Do you have samples? Can you reproduce the issue at will with new documents? Do you have any customization?