Interface line attribute8 in AR invoice not getting populated for Drop ship order

Summary:

In AR invoice we are using the attribute Interface line attribute8 (Waybill number) to group the AR invoice in the grouping.

It is getting populated for normal Sales order Whereas for Drop ship order this is not getting populated even though the waybill is entered during ASN Submit.

Is there any way to capture the Waybill number populated in ASN in the Interface line attribute8 in the AR Invoice.?

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