Xamarin.forms: [Bug] UWP DataTemplate Picker inside CollectionView Xamarin v4.3.0

[AndreiZachi]

Description

CollectionView - DataTemplate Picker in Xamarin v4.3.0 will not show values bound to observablecollection> in UWP. Android and iOS work as expected . Only solution is to roll back to 4.2. Tested on multiple machines with the same result.

Steps to Reproduce

1. Create CollectionView with Picker as DataTemplate
2. Create ObservableCollection>
3. bind Collection view to ObservableCollection>
4. bind picker to ObservableCollection

Expected Behavior

Items visibile in UWP, Android and iOS.

Actual Behavior

Items are visible ONLY in Android and iOS

Basic Information

• Version with issue: 4.3.0
• Last known good version: 4.2.0
• IDE: Visual Studio 2019 v 16.3.5
• Platform Target Frameworks:
  
  
  
  • iOS: v13.1
  
  
  • Android: API 28
  
  
  • UWP: 16299 -> 18...
  
  

Screenshots

Reproduction Link

https://bitbucket.org/AndreiZachiteanu/test/src/master/

[AndreiZachi]

It seems to affect the same control, but the scenario is different. He uses CollectionView and Picker as 2 separate controls, while I have the Picker as DataTemplate for the CollectionView. It seems to be the reason why he has items showing on initialise(), while mine is empty. I haven't gotten to the "Updating part".

[hartez]

Definitely not a duplicate of 8177 - just tried the fix for 8177 against this repro, and it's still not working.

[MagicAndre1981]

ok, thanks for testing it

[AndreiZachi]

Any changes?