R42118 sometimes assigns old shipment (status 80) to released line

Hi,

We are on E1 9.1.5 and use transportation. We have multiple orders consolidation turned on in transportation constants.

Whenever R42118 releases an order line, it assigns an old shipment, even status 80, to the released line. We need to always manually consolidate all released lines before we can ship confirm. Are we missing any set up anywhere that, when turned on, prevents completed shipment numbers from being assigned to released lines?