we currently have a problem with Xamarin.Forms and the Universal Windows Platform.
We have a TabbedPage that has 4 ContentPages, all wrapped in a NavigationPage.
On iOS and Android its displayed properly. On UWP its displayed correctly first (there is a binding error to the title colors of the TabbedPage, so the text is displayed with wrong color), but after navigating to the second page and going back to the first page, the NavigationBar (CommandBar on UWP I guess) just disappears.
This continues till the last page, where the CommandBar stays. Whenever navigating to pages 1 - 3, the CommandBar disappears.
Has anyone noticed behaviour like this? It's really weird and sad, because now we have to adjust behaviour for UWP.