3156984 - Orders are not sent from PPDS into S4Core after upgrade to S4HANA 2020 or higher

After upgrade, orders changed in Embedded PPDS (ePPDS) not getting sent to S4Core anymore, in the scenario, where ePPDS on S4HANA was already being used with the S/4HANA system before the upgrade.
The system before upgrade was on a release from 1610 to 1909, planned and production orders were created in the system before upgrade for PPDS relevant Materials.
With this scenario, an upgrade to S4HANA 2020 or higher has been completed.

System release before upgrade:
from SAP S4HANA 1610 to SAP S4HANA 1909 

System release after upgrade:
SAP S4HANA 2020 and higher

planned order, production order, PPSKZ, not send, S4HANA 2020, /SAPAPO/MATPLSTA, XPRA , KBA , SCM-APO-INT-PPS , PP-DS / Production and Process Order , SCM-APO-PPS , Production Planning and Detailed Scheduling , Problem