[Bug] [iOS] ContentPage in NavigationStack misplaced initially

[planerde]

Description

ContentPage in NavigationStack misplaced initially

Steps to Reproduce

1. Create a new solution from the template 'Shell-Forms App'. This will create a Shell App with Xamarin.Forms 4.6.0.1141 as dependency
2. Start the app in the iOS simulator (I tried 13.6, 13.0 and 12.0), navigate to the "Browse" tab and tap one of the listed entries. This results in a navigation to the ItemDetailPage with correct layout.
3. Upgrade to Xamarin.Forms 4.7 or 4.8 (I tried both) - the iOS and Forms project.
4. Repeater step 2: this time the ItemDetailPage is misplaced under the navigation bar and moved done after a few milliseconds.

Expected Behavior

The expected behavior is the correct navigation to the subpage as with Xamarin.Forms 4.6

Actual Behavior

Misplaced ContentPage content for a short time.

Basic Information

• Version with issue: Xamarin.Forms 4.7 and 4.8
• Last known good version: 4.6.0.11.41
• IDE: Visual Studio for Mac
• Platform Target Frameworks:
  • iOS: 12.0, 13.0, 13.6
• Nuget Packages: Xamarin.Forms, Xamarin.Essentials
• Affected Devices: iOS Simulator

Screenshots

Expected Behavior

Actual Behavior

Workaround

I didn't find a work-a-round for this. In the end I had to downgrade to Xamarin.Forms 4.6.

[rmarinho]

yap can confirm moving from 4.6.0 to 4.7.0 i see the issue..

[PureWeen]

closed by #11791