Current Application gets overridden, causes application level resources to disappear

Use case forms embedding, with application level staticresources:

• Create a new XF page
• Call CreateViewController
• Present the VC the native way.

In this case the existing current XF application gets overridden with an empty one at https://github.com/xamarin/Xamarin.Forms/blob/4c8f901e2333ac1baae818ead61c93559f39758d/Xamarin.Forms.Platform.iOS/PageExtensions.cs#L15

Normally the RealParent would be set when assiging main page. But with embedding this is not used. The code should check wether there is a current XF application before overwriting it.

A workaround until this is fixed is setting the parent manually

var xfPage = new XfPage();
xfPage.Parent = Xamarin.Forms.Application.Current;
var naviteVC = xfPage.CreateViewController();