Theme switching doesn't work properly

Describe the bug

Hello, I am trying to implement a dark theme into my application, but trying to switch themes causes some weird behavior (see clip).

Page.cs:

private async void OnLightThemeRadioButtonChecked(object sender, RoutedEventArgs e)
{
    Wpf.Ui.Appearance.ApplicationThemeManager.Apply(Wpf.Ui.Appearance.ApplicationTheme.Light);
}

private async void OnDarkThemeRadioButtonChecked(object sender, RoutedEventArgs e)
{
    Wpf.Ui.Appearance.ApplicationThemeManager.Apply(Wpf.Ui.Appearance.ApplicationTheme.Dark);
}

MainWindow.cs:

public MainWindow()
{
    Wpf.Ui.Appearance.SystemThemeWatcher.Watch(this);
    InitializeComponent();
}

To Reproduce

Switch themes with Wpf.Ui.Appearance.ApplicationThemeManager.Apply()

Expected behavior

I would expect the themes to simply switch like in the demo app.

Screenshots

https://github.com/user-attachments/assets/c060c449-18ee-4518-b2fd-936ec2c8c94c

OS version

Windows 11 23H2 (Build 22631.3958)

.NET version

.Net 8.0

WPF-UI NuGet version

3.0.5

Additional context

No response

Start by reproducing the behavior from the Page.cs theme handlers and MainWindow.cs initialization shown in the report, then compare the result with the demo app. Check the documented WPF-UI theme-switching flow for .NET 8 and version 3.0.5; done means switching between Light and Dark produces the same result as the demo.