I'm trying to load a Wechat official account URL https://mp.weixin.qq.com/s/PcUNumU5j2T3UD-3FN66lQ and I get some exceptions and a strange page.
The java code looks to add some useless Html tags like span and attributes like "display:none" in div which causes the div not visible (please check out the attachment below).
My code:

public static String getPageXmlByUrl(String url) {
    if (!isUrl(url)) {
        throw new ServerException(ResultEnum.PARAM_ERROR);
    }
    final WebClient webClient = new WebClient(BrowserVersion.FIREFOX);

    webClient.getOptions().setThrowExceptionOnScriptError(false);
    webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
    webClient.getOptions().setActiveXNative(false);
    webClient.getOptions().setCssEnabled(false);
    webClient.getOptions().setJavaScriptEnabled(true); 
    webClient.getOptions().setDownloadImages(false);
    webClient.getOptions().setWebSocketEnabled(true);
    webClient.setAjaxController(new NicelyResynchronizingAjaxController());

    HtmlPage page = null;
    try {
        page = webClient.getPage(url);
        webClient.waitForBackgroundJavaScript(2000);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        webClient.close();
    }
    String pageXml = page.asXml();
    return pageXml;
}

Exceptions:
Exceptions.txt

Result Html from the testing code
Strange Page.html.txt