Defaulting Sub inventory for a Drop-ship SO

 Hi        We have a requirement to default the Sub inventory, for a specific receiving org,  on a Sales order line where the Source type = External (drop-ship SO).  We had setup the Defaulting rule for the Entity -> Order Line and the Attribute -> Subinventory. We did run the "Generate Defaulting handler package" after we changed the defaulting rules setup.

Now, when I create a new SO (I tried to create manually first and then thro Order Import), the Subinventory fields doesn't get defaulted.on the SO Line. This works dine when the Source type = Internal.

We are on 11.5.10

any input on this is greatly appreciated