Maui community toolkit CameraView returning empty PNG image

Question

C# .net9 Maui on Android. On both the phone and emulator, the MAUI Community Toolkit CameraView seems to work fine for viewing as I can see the preview, but when I attempt to take a photo I get an empty (but valid) PNG image - with no errors.

How do I take a photo and get the bytes?

XAML

    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"
    Color="Transparent">

    <Border Stroke="Gray" StrokeThickness="2" Padding="20"
            StrokeShape="RoundRectangle 15" BackgroundColor="white">

        <VerticalStackLayout Spacing="15" WidthRequest="350"  HorizontalOptions="Fill">
            <toolkit:CameraView x:Name="Camera"
                            BackgroundColor="Transparent"
                            VerticalOptions="Fill"
                            HorizontalOptions="Fill"/>
            <HorizontalStackLayout Spacing="10" HorizontalOptions="Center">
                <Button Text="Capture" BackgroundColor="Green" TextColor="White" Clicked="OnCaptureClicked"/>
                <Button Text="Cancel" BackgroundColor="Red" TextColor="White" Clicked="OnCancelClicked"/>
            </HorizontalStackLayout>
        </VerticalStackLayout>

    </Border>
</toolkit:Popup>

CS

private readonly TaskCompletionSource<byte[]?> _completionSource = new();

public CapturePhotoPopup()
{
    InitializeComponent();

    Closed += (object? sender, PopupClosedEventArgs e) =>
    {
        Camera.StopCameraPreview();
        _completionSource.TrySetResult(null);
    };
}

private async void OnCaptureClicked(object sender, EventArgs e)
{
    var photo = await Camera.CaptureAsync();
    if (photo != null)
    {
        using var stream = await photo.OpenReadAsync();
        using var ms = new MemoryStream();
        await stream.CopyToAsync(ms);
        
        //ms.ToArray() contains a valid empty PNG image.
        
        _completionSource?.SetResult(ms.ToArray());
    }
    else
    {
        _completionSource?.SetResult(null);
    }

    Close();
}