EAM_TASKLIST_CREATE - Valid Date Issue

While creating task list through EAM_TASKLIST_CREATE BAPI in S4 Hana System, the Valid From Date (DATUV) from header is not updated in Operation Valid From Date.

I can only Input (DATUV) in Header, the Operation (DATUV) automatically takes the current date. this issue having an Impact in the Maintenance Scheduling.

Could any one came across such Issue in S4 HANA system. Any how can suggest on this..