Inbound delivery - VL31N does not show all PO items

Hi Team,

Customer's process consists of create Inbound delivery(VL31N) prior MIGO. All PO items have been created and control confirmation key assigned - value 0004.

However, when run VL31N in order to create inbound delivery...

Only 2 items are displayed when 3 are expected.

I have been trying to identify root cause but without success yet.

Thanks in advance,

Robson