3329470 - Unable to post time for a service performer

A contingent worker wishes to add working hours via the app 'Manage My Timesheet'. However, Purchase Orders relevant to the user, as a service performer, do not appear in the 'My Tasks' worklist.   

SAP S/4HANA Cloud Public Edition

i_serviceperformertosuplr, CL_CATS_COMMON_REUSE, CL_HCM_CATS_MAN_V1_REUSE, GET_PO_DETAILS_BY_SERV_PERF, Supplier PERNR, service performer, purchase order, contingent worker, working hours, my tasks , KBA , CA-TS-S4 , Cross Application Timesheet in S/4HANA , MM-PUR-PO , Purchase Orders , MM-FIO-PUR-PO , Fiori UI for Purchase Orders , MM-PUR-SVC-SES , Service Entry Sheet for Service Procurement , MM-FIO-SRV , Fiori UI for Services Management , Problem