collection view on iOS can not select duplicate items when grouping is enabled

[JeffTobin]

Description

On iOS a collection view that has grouping enabled and contains data with repeated items, is unable to select any repeated item without multiple taps.

Steps to Reproduce

1. Create a blank project containing a collection view with grouping enabled.
2. bind an item source that is grouped and contains repeated values
3. build and discover the problem first hand

Expected Behavior

repeated item should be selected uniquely, just like listview.

Actual Behavior

selecting a repeated item cause the list to jump and select the first occurrence of selected item.

Basic Information

• tested with 4.3 - 4.5pre4
• Last known good version: unknown
• IDE: visual studio for Mac
• Platform Target Frameworks:
  • iOS: 13.3
• Affected Devices: all iOS devices on 13.3

Video

https://drive.google.com/open?id=1Q-VNg4TILQqbjBB2TgN02hW8wSO3O-db

Reproduction Link

https://drive.google.com/file/d/1IeAZTryFuf2I-cKtf75QT6AXiNyEOLz_/view?usp=sharing

Workaround

not known

[jsuarezruiz]

I can reproduce the issue problem. Tested on iOS 12 and 13 and Xamarin.Forms 4.4-4.6.