Border shadow not rendered correctly

[pikausp]

Description

Different combinations of border placement and background color produce different-looking shadows.

Steps to Reproduce

Tested the following combinations

• Border without background inside a scrollview
• Border without background inside grid inside a scrollview
• Border without background
• Border with background inside a scrollview
• Border with background inside grid inside a scrollview
• Border with background

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="ShadowInsideScrollView.MainPage">
    <ContentPage.Resources>

        <Style TargetType="Border">
            <Setter Property="Margin"
                    Value="20" />
            <Setter Property="StrokeShape"
                    Value="{RoundRectangle CornerRadius=20}" />
            <Setter Property="Shadow">
                <Setter.Value>
                    <Shadow Brush="Black"
                            Offset="20,20"
                            Radius="10"
                            Opacity="1"/>
                </Setter.Value>
            </Setter>
        </Style>
    </ContentPage.Resources>

    <Grid RowDefinitions="*, *, *, *, *, *"
          RowSpacing="10">
        <ScrollView>
            <Border />
        </ScrollView>

        <ScrollView Grid.Row="1">
            <Grid>
                <Border />
            </Grid>
        </ScrollView>

        <Border Grid.Row="2" />

        <ScrollView Grid.Row="3">
            <Border BackgroundColor="White" />
        </ScrollView>

        <ScrollView Grid.Row="4">
            <Grid>
                <Border BackgroundColor="White" />
            </Grid>
        </ScrollView>

        <Border BackgroundColor="White"
                Grid.Row="5"/>
    </Grid>

</ContentPage>

Link to public reproduction project repository

https://github.com/pikausp/ShadowInsideScrollView

Version with bug

8.0.3

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

Android 14

Did you find any workaround?

No response

Relevant log output

No response

[ghost]

We've added this issue to our backlog, and we will work to address it as time and resources allow. If you have any additional information or questions about this issue, please leave a comment. For additional info about issue management, please read our Triage Process.

[XamlTest]

Verified this on Visual Studio Enterprise 17.9.0 Preview 2(8.0.3). Border shadow not rendered different on Windows, Android 14.0-API34, iOS 17.0 and MacCatalyst.
Project: ShadowInsideScrollView.zip

Windows:

Android 14.0-API34:

iOS 17.0:

MacCatalyst: