Changing properties of Shape.Stroke brush does not update app rendering

[etvorun]

Description

Changing Shape.Stroke does not update app rendering

Steps to Reproduce

1. Create new MAUI app.
2. Set Windows as target platform.
3. Open MainPage.xaml and replace content of <ContentPage> element with

  <VerticalStackLayout>
    <Button x:Name="MyButton" Text="Change color" Margin="4" HorizontalOptions="Start"/>
    <Line x:Name="MyLine" X1="0" X2="150" StrokeThickness="4" HorizontalOptions="Start"/>
  </VerticalStackLayout>

4. Open MainPage.xaml.cs and replace implementation with

public partial class MainPage : ContentPage
{
	SolidColorBrush brush;
	Color[] colors = { Colors.Green, Colors.Red, Colors.Blue };
	int colorIndex = -1;

	public MainPage()
	{
		InitializeComponent();
		brush = new SolidColorBrush();
		UpdateBrushColor();

        // Use same brush for Button and Line
		MyLine.Stroke = brush;
        MyButton.Background = brush;
        MyButton.Clicked += (s, e) => UpdateBrushColor();
    }

	void UpdateBrushColor()
	{
		if (++colorIndex >= colors.Length)
			colorIndex = 0;

		brush.Color = colors[colorIndex];
	}
}

5. Build and run
6. Click "Change color" button few times.
   Expected: both button and line will change colors.
   Actual: only button changes color.

Link to public reproduction project repository

n/a

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

Windows, I was not able test on other platforms

Affected platform versions

Win 22H2

Did you find any workaround?

No response

Relevant log output

No response

[ghost]

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