I just create a really simple WPF Browser Application with one RadRibbonView control in it. Here's the actual code :
<Page xmlns:my="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.RibbonView" x:Class="WpfBrowserApplication1.Page1"
When i launch the application, well, i don't see anything. The ribbon is not display at all. But, when i actually resize the window, it suddenly appear.
I don't have this behavior in a WPF application. It's seem to be an issue only with WPF Browser Application.
Are you able to reproduce this error? If so, is there a way to force the UI to display the ribbon without resizing the web page?