Scenario
Customer noticed that Purchase Orders that was placed on Inbound Shipment would show a value under Quantity on Shipment column.
Solution
The intention of the Shipment column is to reflect the number quantities that has a related Inbound Shipment. It does not reflect the number of quantities on an Inbound Shipment that are still in-transit. Therefore, it will not update to 0 once those Inbound Shipments had been received.