Cell Editing does not work on DataGrid on Android

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I'm submitting a...

Bug report (I searched for similar issues and did not find one)

Current behavior

Cell Editing on DataGrid generates error on Android
System.ArgumentOutOfRangeException: Index must be within the bounds of the List.

Expected behavior

Minimal reproduction of the problem with instructions

1.- compile
2.- Go to DataDrid Example, try to edit a cell

Environment

Nuget Package(s): 

Package Version(s): 

Windows 10 Build Number:
- [ ] Fall Creators Update (16299)
- [ ] April 2018 Update (17134)
- [ ] October 2018 Update (17763)
- [ X] May 2019  (18363.387 )

[wct.txt](https://github.com/unoplatform/Uno.WindowsCommunityToolkit/files/3665998/wct.txt)


Device form factor:
- [X ] Android
- [X] iOS
- [X ] WASM
- [ ] Surface Hub
- [ ] IoT

Visual Studio 
- [X ] 2019 16.3.1
- [ ] 2017 Preview (version: )