AttachedDropShadow casts wrong shadow on different scale screens

[DilanBoskan]

Describe the bug

I have noticed that the AttachedDropShadow messes up the shadow rendering when we combine different screen scalings with different scaled assets (scale-100, scale-125, ...).

This is how the shadow looks on my 100% scaled screen. It loads the scale-100 image.

This is what happens when I move the window to my surface laptop studio screen. It loads the scale-150 image and the shadow gets messed up.

In general, the moving from one screen to the other is to illustrate that the shadow does work at first and then gets messed up.
If you open the Window in the high scale screen, the shadow is messed up anyways, it doesn't need to be moved.
I am not sure if the cause is the screen scale or the PPI/DPI, I am no expert in this matter.

Regression

No response

Steps to reproduce

Important

Make sure you have 2 monitors with different scales connected to your machine

AttachedDropShadowRepo.zip

1. Open Solution
2. Run Project
3. Move Window from scale screen to scale screen
4. See the wrong shadow

Expected behavior

The correct shadow as is when there is only one monitor attached, or when only one asset scaling is present.

Screenshots

That's the code

<Grid Width="1000" Height="1000"
      Background="White">
    <Border x:Name="ShadowTarget"
            HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>

    <Image Width="300" Height="300"
           Source="/Assets/Images/FolderImage.png">
        <ui:Effects.Shadow>
            <ui:AttachedDropShadow CastTo="{x:Bind ShadowTarget}"
                                   BlurRadius="20"
                                   Offset="0" Color="#00ff00"/>
        </ui:Effects.Shadow>
    </Image>
</Grid>

IDE and version

VS 2022

IDE version

No response

Nuget packages

• CommunityToolkit.Common
• CommunityToolkit.Diagnostics
• CommunityToolkit.HighPerformance
• CommunityToolkit.Mvvm (aka MVVM Toolkit)

Nuget package version(s)

CommunityToolkit.Uwp.Extensions Version "8.2.250402"

Additional context

No response

Help us help you

Yes, but only if others can assist