<detail> is missing in SOAP Fault when a web service throws an exception in EAP 6

Issue

• We are migrating a web service application from GlassFish to JBoss.
• When we throw an exception JBoss does not include <detail> in the response.
• This is how we are sending the SOAP Fault now:

final String reason = "Data not found";
SOAPFactory factory = SOAPFactory.newInstance();
javax.xml.soap.SOAPFault fault = factory.createFault(reason, new QName("CLIENT"));
throw new DataNotFoundFault_Exception(
    reason, new DataNotFoundFault(), new SOAPFaultException(fault));

• Response in GlassFish:

<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
   <S:Body>
      <S:Fault xmlns:ns4="http://www.w3.org/2003/05/soap-envelope">
         <faultcode>CLIENT</faultcode>
         <faultstring>Data not found</faultstring>
         <detail>
            <ns2:dataNotFoundFault xmlns:ns2="http://www.example.com/soap/app"/>
         </detail>
      </S:Fault>
   </S:Body>
</S:Envelope>

• Response in JBoss:

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
   <soap:Body>
      <soap:Fault>
         <faultcode>soap:CLIENT</faultcode>
         <faultstring>Data not found</faultstring>
      </soap:Fault>
   </soap:Body>
</soap:Envelope>

• The node <detail> and its contents are missing when we run the application from JBoss.