DPR_DPRProjectionStartInfo_Run_Synchronization does not provide value to Shelltags on Azure Active Directory sync project execution

Environment: 1IM 9.1

When i execute an AAD synchronization project i can see that  DPR_DPRProjectionStartInfo_Run_Synchronization process provides empty value to ShellTags parameter in the FirePostSync step, this  causes the generating condition  on AAD_Organization_SearchAndCreate_Person_PostSync to failed and therefore no Account-Person link happens, any hint is highly appreciated..