3680348 - Item values are not copied from referenced document when create contract via API_SALES_CONTRACT_SRV though it works fine in T-Code VA41

• Create contract via API_SALES_CONTRACT_SRV, item values are not copied from referenced document. The payload is like:
  ==============================================
   "SoldToParty": "1000",
    "SalesContractType": "ZCQ",
    "SalesOrganization": "1000",
    "DistributionChannel": "10",
    "OrganizationDivision": "10",
    "ReferenceSDDocument": "1111", 
  ...
     "to_Item": [
        {
          "Material": "XX",
          "ProductionPlant": "1000",
          "RequestedQuantity": "1", 
  ...
   }], 
  ...
  ==============================================
• Country-related data, such as tax codes and tax laws, is not populated in the contracts created via the API_SALES_CONTRACT_SRV.
• Pricing data does not get copied from referenced document.
• As comparation, manually creating contract with reference to the document using transaction VA41 works correctly.

• Sales And Distribution (SD)
• SAP S/4HANA
• SAP S/4HANA Cloud Private Edition

VBAP_KOPIEREN_PRUEFEN, /IWFND/GW_CLIENT , KBA , SD-SLS-API , APIs for Sales Document in S/4 Sales & Distribution , Problem