AEM 6.1 - Filter RequestDispatcher Forward breaks i18n

I just noticed that on AEM 6, in my Filter, when I call RequestDispatcher forward, i.e. request.getRequestDispatcher(...).forward(req, res);, it cause i18n to break. Here's a snippet of my codes:

...

boolean filtered = false;

SlingHttpServletRequest request = req instanceof SlingHttpServletRequest ? (SlingHttpServletRequest) req : null;

SlingHttpServletResponse response = res instanceof SlingHttpServletResponse ? (SlingHttpServletResponse) res : null;

            

if (request != null && response != null) {

                

    // block of codes to resolve the request uri and get the new desired URI 

                    

    if (this.resolvedUriResource != null) {

        String uri = this.resolvedUriResource.getPath() + ".html";

        RequestDispatcherOptions options = new RequestDispatcherOptions();

        options.setAddSelectors(uriSelectors);

        this.filterConfig.getServletContext().getRequestDispatcher(uri).forward(req, res); // OR

        //request.getRequestDispatcher(this.resolvedUriResource, options).forward(req, res);

        filtered = true;

    }

}

if (!filtered) {

    chain.doFilter(req, res);

}

...

The exact same codes were working on AEM6.0 and AEM 5.6.x.
Download this package to try out and see the issue: AEM6.1-i18n-issue-samplepackage.zip.