3706558 - Down Payment G/L missing when final invoice references Preliminary Billing Document

When creating a final invoice with reference to a Preliminary Billing Document with a down payment line item, the down payment G/L account is not posted in Financial Accounting.

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

SAP S/4HANA Cloud Public Edition 

manage billing documents, PBD, billing documents, down payment, post down payment, G/L, 7S7 , KBA , SD-BIL-2CL , Billing (Public Cloud) , Problem