@Initialized and @Destroyed event are not fired if a portable extension is used in an app

@WebServlet("/hello")
public class HelloWorldExtensionTestServlet extends HttpServlet {

    @Inject
    HelloWorldExtensionBean hello;

    private static EventMetadata beanStartMetaData;
    private static EventMetadata beanStopMetaData;

    private static final long serialVersionUID = 8549700799591343964L;

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {

        PrintWriter pw = response.getWriter();
        pw.write(hello.hello());
        pw.write(beanStartMetaData.getQualifiers().toString());
        pw.write(beanStopMetaData.getQualifiers().toString());
        pw.flush();
        pw.close();
    }

    public static void onStart(@Observes @Initialized(RequestScoped.class) Object e, EventMetadata em) {
        if (beanStartMetaData == null) {
            System.out.println("Initialize Event request scope is happening");
            beanStartMetaData = em;
        }
    }
    public static void onStop(@Observes @Destroyed(RequestScoped.class) Object e, EventMetadata em) {
        if (beanStopMetaData == null) {
            System.out.println("Stop Event request scope is happening");
            beanStopMetaData = em;
        }
    }

}

@RequestScoped
public class HelloWorldExtensionBean {

    public String hello() {
        return "Hello World CDI 1.2!";
    }

}