Problem with TabbedPage having other NavigationPages (Video and Source inside)

Hi,

I have a problem with combining TabbedPage navigation leading to other NavigationPages. Because its hard to explan just with text, I made a short Video about it:

You can also find my example project on GitHub: https://github.com/Grrbrr404/Xamarin.TabNavigation

Are there any solutions for my problem? Thank you very much