[Bug] Button disappears when setting CornerRadius

[davidortinau]

Description

On Android 10 the Button only appears/renders when the CornerRadius is zero.

<Button
    Grid.Row="1"
    HorizontalOptions="End"
    VerticalOptions="Center"
    HeightRequest="44"
    WidthRequest="44"
    Background="{StaticResource BlueGradient}"
    BorderWidth="0"
    TextColor="White"
    FontSize="24"
    Padding="0"
    CornerRadius="{OnPlatform Android=8, Default=8}"
    Text="{x:Static theme:IconFont.Plus}"
    FontFamily="FontAwesome"/>

CornerRadius=0:

CornerRadius=8:

Basic Information

• Version with issue: 5.0-nightly
  • Android: 10

Reproduction Link

https://github.com/davidortinau/PersonalFinanceSample

[hartez]

@davidortinau Can you fix the build errors in that repro project? Also, there's a flag missing and it crashes at runtime telling me that there's no static resource called CalendarRadioTemplate.

[jsuarezruiz]

I have created a repro sample using 5.0.0 branch: https://github.com/xamarin/Xamarin.Forms/tree/fix-12315 but cannot reproduce the issue:

I'm missing something?

[davidortinau]

pushed davidortinau/PersonalFinanceSample@f08e0fb which compiles, runs, and fails to render the Button.

https://github.com/davidortinau/PersonalFinanceSample/blob/main/src/PersonalFinance/Pages/MainPage.xaml#L69

[jsuarezruiz]

I still can't reproduce the issue (neither creating example, nor in branch 5.0.0) :(
I have created a small example using Xamarin.Forms 5.0-pre2:
Issue12315.zip

The result (same Button using exactly the same properties):

@hartez or someone else, can you try the David example and/or mine?

[davidortinau]

Updated to 5.0-pre2 and it's working now.

So I tried 5.0.1.16606-nightly and it's broken (button disappeared).

Same with your sample project. Button appears when I change to 0 radius.

Updated solution:
Issue12315.zip

[jsuarezruiz]

I can reproduce the issue in the last attached example but on the 5.0.0 branch, I still can't reproduce it.
@PureWeen Could you try https://github.com/xamarin/Xamarin.Forms/blob/fix-12315/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue12315.xaml to validate this case, please?

[ryanharding]

This is still happening on live version. 5.0.1.1876

[kmvickers]

I have this happening in version 5.0.1.1876 was there ever a fix ?