Sales Order Entry MasterUpdate Lotnum clears

I’m trying to get the lotnum on the sales order summary lines to stick after the MasterUpdate fires. The trace shows the Lotnum field being populated, but the returned results show the LotNum being empty.

Changed value in the Paramdataset shows the LotNum value as changed.

  <changedValue tableName="OrderDtl" rowState="Modified" rowNum="0" colName="LotNum"><![CDATA[9987654]]></changedValue>

I’m assuming there is something in the client side that’s forcing the clear.

Why am I doing this? I’m hoping that the lotnum will populate on the customer shipment entry form when a mass ship/ship all is performed.