[Bug] Regression: FontIcon rendering quality decreased (UWP)

[CleanCodeDeveloper]

Description

FontIcons rendering quality in AppShell Flyout decreased with Xamarin.Forms v4.6.0.726 compared to previous version v4.5.0.657 or v4.5.0.725

Steps to Reproduce

1. Define FontImageSource in ResourceDictionary

<ResourceDictionary>
    <FontImageSource FontFamily="Segoe MDL2 Assets" Glyph="&#xE80F;" Color="Black" x:Key="IconHomeFlyout"/>
    <FontImageSource FontFamily="Segoe MDL2 Assets" Glyph="&#xE713;" Color="Black" x:Key="IconSettingsFlyout"/>
    <FontImageSource FontFamily="Segoe MDL2 Assets" Glyph="&#xE946;" Color="Black" x:Key="IconAboutFlyout"/>
            
    <FontImageSource FontFamily="Segoe MDL2 Assets" Glyph="&#xE80F;" x:Key="IconHome"/>
    <FontImageSource FontFamily="Segoe MDL2 Assets" Glyph="&#xE713;" x:Key="IconSettings"/>
    <FontImageSource FontFamily="Segoe MDL2 Assets" Glyph="&#xE946;" x:Key="IconAbout"/>
</ResourceDictionary>

2. Use the FontIcon in an ShellItem

<ShellItem Title="{x:Static localization:AppResources.PageName_Settings}" Route="settings" 
               Icon="{StaticResource IconSettings}" FlyoutIcon="{StaticResource IconSettingsFlyout}">
    <views:SettingsPage Title="Settings"/>
</ShellItem>

<ShellItem Title="{x:Static localization:AppResources.PageName_About}" Route="about" 
               Icon="{StaticResource IconAbout}" FlyoutIcon="{StaticResource IconAboutFlyout}">
    <views:AboutPage Title="About"/>
</ShellItem>

Expected Behavior / Actual Behavior

Basic Information

• Version with issue: v4.6.0.726, v4.6.0.800, 4.7.0.813-pre2
• Last known good version: v4.5.0.725
• IDE: VS 2019 (v16.6.0 Preview 5)
• Platform Target Frameworks:
  • UWP: 10.0.18362.0

Screenshots

See above

Reproduction Link

FontIconRenderingQuality10538.zip

Workaround

None

[StephaneDelcroix]

does this happens only in a shell item ? or elsewhere too ?
could you please provide a reproduction sample ? thanks

[CleanCodeDeveloper]

The bug occurs only in the Flyout of the ShellItem.

I've create a small reproduction sample:
FontIconRenderingQuality10538.zip

[CleanCodeDeveloper]

@StephaneDelcroix: Is the repro I added sufficient?