Getting a white screen while navigating.

Hi.

I am building a Xamarin.Forms app using PRISM and I am getting the weirdest behavior.
I am pretty sure that it started right after I updated PRISM when the made their IInitialize breaking change.

Here is the flow of my app.
The first screen is the Login page and I am navigating to it in my OnInitialized method in App.xaml.cs

await NavigationService.NavigateAsync("NavigationPage/MainPage");

Once the user is logged in I am using the following line to navigate to the "home" page:

await NavigationService.NavigateAsync("/MainMasterPage/NavigationPage/PlayersHomePage");

This is where I get the white screen for a second and then the tabbed page loads up OK.
I notices that if I remove the Navigation page the white screen does not show up, but I cant do without it.

the PlayersHomePage is a TabbedPage with 3 tabs:

<TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
            xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
            xmlns:prism="clr-namespace:Prism.Mvvm;assembly=Prism.Forms"
            xmlns:views="clr-namespace:FplMatchdayLive.Views"
            prism:ViewModelLocator.AutowireViewModel="True"
            Title="{Binding Title}"
            x:Class="xxx.Views.PlayersHomePage">
    <TabbedPage.Children>
        <views:TeamPage></views:TeamPage>
        <views:LeaguesPage></views:LeaguesPage>
        <views:FixturesPage></views:FixturesPage>
    </TabbedPage.Children>
</TabbedPage>

in the PlayersHomePage code behinde I am using IInitalize to initialize all the tabs:

public partial class PlayersHomePage : TabbedPage, IInitialize
{
    public PlayersHomePage()
    {
        InitializeComponent();
    }
    public void Initialize(INavigationParameters parameters)
    {
        if (parameters.GetNavigationMode() == NavigationMode.New)
        {
            // Prism always raises OnNavigatedTo on 1st tabbed page so this prevents the first tab being initialised twice
            if (Children.Count == 1)
            {
                return;
            }
            for (var pageIndex = 1; pageIndex < Children.Count; pageIndex++)
            {
                var page = Children[pageIndex];
                (page?.BindingContext as INavigationAware)?.OnNavigatedTo(parameters);
            }
        }
    }
}

I tried removing all the tabs from the TabbedPage thinking its the initialization that is causing this but it did not help.

Any ideas as to how to solve it?