is it happening to other iviews, where you cant see employees like Team view ie MSSBIZVIEW customisation.
can you check the specilist box and see what you get ?
ie in view View: V_THV_APP
MSSEESELECT Hierarchy for Start Process for Employee CL_HIER_VIS_OADP_DEFAULT_IMPL
MSSMASSPROC Hierarchy for Start Process for Multiple Employees CL_HIER_VIS_OADP_DEFAULT_IMPL