Hosted page is not served properly (jsp headers not taken into account, served as text)

To reproduce in standalone, modify the hosted jsp to server utf8 content with a charset other than latin (eg the Greek phrase: "Δοκιμαστικό Μήνυμα"), notice that the message is not displayed properly. A further look into the sent headers will reveal that other things are also not sent properly.

The following jsp snippet can be used as the head of the hosted jsp:

<%@ page language="java" pageEncoding="UTF-8" contentType="text/html; charset=UTF-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>

<c:set var="lng" value="${not empty param.lang ? param.lang : not empty lng ? lng : pageContext.request.locale}" scope="session" />

private void forwardHosted(Request request, Response response) throws ServletException, IOException {
logger.trace("SAML 1.1::Proceeding to IDP index page");
RequestDispatcher dispatch = getContext().getServletContext()
.getRequestDispatcher(this.idpConfiguration.getHostedURI());

recycle(response);
response.reset();

try

catch (ClassCastException cce)

}