Wrong Web Service Name Space Is Used And Unexpected SOAP Envelope Is Generated By Camel

Issue

With the following Camel route, sometimes it generates an
unexpected soap envelope. But sometimes not.

<cxf:cxfEndpoint address="${ADDRESS}" id="sampleEndpoint" serviceClass="sample.DemoWS"/>

~~skip~~

<to id="demo" uri="cxf:bean:sampleEndpoint"/>

import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;
import javax.jws.soap.SOAPBinding;
import javax.xml.bind.annotation.XmlSeeAlso;

@WebService(targetNamespace = "http://demo", name = "demo")
@SOAPBinding(parameterStyle = SOAPBinding.ParameterStyle.BARE)
public interface DemoWS {

Due to the unexpected soap envelope, SoapFault occurs.