WTC ImageEx control displays placeholders instead of primary content

[xperiandri]

<tc:ImageEx
    Grid.RowSpan="2"
    Grid.ColumnSpan="2"
    Width="65"
    Height="65"
    Margin="15"
    HorizontalAlignment="Center"
    VerticalAlignment="Center"
    Background="{StaticResource OffWhiteBrush}"
    CornerRadius="999"
    PlaceholderSource="ms-appx:///Assets/oval.png"
    PlaceholderStretch="UniformToFill"
    Source="{Binding AvatarURL}" />

Current behavior (Android)

Expected behavior (UWP)

How to reproduce it (as minimally and precisely as possible)

I can provide access to a private Azure DevOps repository.

Environment

<PackageReference Include="Uno.Core" Version="2.0.0" />
<PackageReference Include="Uno.UI.Msal" Version="3.0.0-dev.692" />
<PackageReference Include="Uno.Microsoft.Toolkit" Version="6.1.0-build.178.gc768b0f669" />
<PackageReference Include="Uno.Microsoft.Toolkit.Uwp.Connectivity" Version="6.1.0-build.178.gc768b0f669" />
<PackageReference Include="Uno.Microsoft.Toolkit.Uwp.DeveloperTools" Version="6.1.0-build.178.gc768b0f669" />
<PackageReference Include="Uno.Microsoft.Toolkit.Uwp.Notifications" Version="6.1.0-build.178.gc768b0f669" />
<PackageReference Include="Uno.Microsoft.Toolkit.Uwp.Services" Version="6.1.0-build.178.gc768b0f669" />
<PackageReference Include="Uno.Microsoft.Toolkit.Uwp.UI.Animations" Version="6.1.0-build.178.gc768b0f669" />
<PackageReference Include="Uno.Microsoft.Toolkit.Uwp.UI.Controls" Version="6.1.0-build.178.gc768b0f669" />
<PackageReference Include="Uno.Microsoft.Toolkit.Uwp.UI.Media" Version="6.1.0-build.178.gc768b0f669" />

Affected platform(s):

• [X] iOS (not tested)
• [X] Android
• [X] WebAssembly
• [ ] WebAssembly renderers for Xamarin.Forms
• [ ] macOS (not tested)
• [ ] Windows
• [ ] Build tasks
• [ ] Solution Templates

Visual Studio:

• [ ] 2017 (version: )
• [X] 2019 (version: 16.6)
• [ ] for Mac (version: )

[jeromelaban]

Thanks for the report!

Note for contributors

This kind of issue is generally related to this issue: https://github.com/unoplatform/uno/issues/857

Adding a conditional xamarin:Content and xamarin:ContentTemplate is generally enough to work around the issue. In this case, it would need to be added to the ImageEx WCT default template.

[xperiandri]

Do you mean that I need to set that feature flag in my code?

[xperiandri]

Or update the templates to use explicit binging?

[xperiandri]

Could you point to the sample XAML?