Please be aware that this WF-BATCH has been replaced with SAP_WFRT for S/4 HANA.
Starting with S/4 Hana OnPremise 1709 the workflow system user and workflow system jobs changed. The workflow system user is called SAP_WFRT now instead of WF-BATCH. The workflow system jobs start with SAP_WORKFLOW now and are scheduled automatically by the "Technical Job Repository", transaction SJOBREPO.
Starting with S/4 Hana OnPremise 1809 the workflow system jobs are scheduled under the user, under which the system jobs of Technical Job Repository run. This might be a different user than SAP_WFRT.