Problems using the WebView Control inside a RichTextBlock

Hello,

I'm trying to display an html page (that is included in my App) inside a WebView control that is in a RichTextBlock.

When I use the WebView outside the RichTextBlock it shows the content properly.

<WebView Name="webView1" Height="400" Source="ms-appx-web:///HTMLPage1.html"/>

But when I embed the WebView in the RichTextBox, nothing is displayed. See below the example that does not work:

 <RichTextBlock>
            <Paragraph>
                <InlineUIContainer>
                    <Border Background="Black">
                        <WebView Name="webView" Height="400" Source="ms-appx-web:///HTMLPage1.html"/>
                    </Border>
                </InlineUIContainer>
            </Paragraph>
        </RichTextBlock>