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Created attachment 13219 [details]
Steps to reproduce:
1. Open Attached project on VS.
2. Update Xamarin.Forms to 126.96.36.19955-pre1.
3. Run Windows Phone app.
4. Click to Tabbed Page (MasterDetailpage).
Actual result: Title page 'tabed page a1' shows twice.
Expected result: Title page 'tabed page a1' should shows one.
Microsoft Visual Studio Professional 2013
Version 12.0.30723.00 Update 3
Microsoft .NET Framework
Installed Version: Professional
Xamarin 188.8.131.528 (e8fb98c)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android 184.108.40.206 (f94dc5b)
Visual Studio plugin to enable development for Xamarin.Android.
Xamarin.iOS 220.127.116.11 (b5396c2)
Visual Studio extension to enable development for Xamarin.iOS.
Xamarin.iOS Unified Migration 1.0
Automated migration for Xamarin iOS Classic projects to Unified
Thank you for taking the time to submit this report. After reviewing the description of this bug, we believe it no longer affects the current version of Xamarin.Forms. If you are still experiencing the issue after updating your packages, please reopen this report with an attached reproduction.
For your convenience, we have created some reproduction best practices viewable here: https://gist.github.com/jassmith/92405c300e54a01dcc6d
Xamarin Forms Team