SOAPFaultException cannot render SOAP 1.2 Fault Subcode in CXF

  import javax.xml.soap.SOAPConstants;
  import javax.xml.soap.SOAPFactory;
  import javax.xml.soap.SOAPFault;
  import javax.xml.ws.soap.SOAPFaultException;
  ...
    SOAPFactory factory = SOAPFactory.newInstance(SOAPConstants.SOAP_1_2_PROTOCOL);
    SOAPFault fault = factory.createFault("Operator not found", new QName(SOAPConstants.URI_NS_SOAP_1_2_ENVELOPE, "Receiver"));
    fault.appendFaultSubcode(new QName("...", "OperatorNotFound"));
    ...
    throw new SOAPFaultException(fault);