Is OnPropertyChanged(); inside a ContentView not working to notify ALL properties anymore?

[bnSonic]

I have a ContentView where I like to inform the UI about Property-Changed when I switch my theme for example.
I'm pretty sure it works in Xamarin but now not in Maui .net9 anymore?!

For example I have this base class

    public class SettingsCellViewBase : ContentView
    {
        public SettingsCellViewBase()
        {
            WeakReferenceMessenger.Default.Register<ThemeChangedMessage>(this, (o, msg) =>
            {
                OnPropertyChanged(); 
            });
        }
...

used like this for example:

public partial class SettingTextRadialProgressCell : SettingsCellViewBase
{
	protected override void OnPropertyChanged(string propertyName = null)
	{
		base.OnPropertyChanged(propertyName);
		if (propertyName == SettingTextCell.IsEnabledProperty.PropertyName)
		{
			OnPropertyChanged(nameof(TextColor));
		}
	}
	
	public Color TextColor => this.IsEnabled
            ? _theme.GetColor(BaseTheme.ColorName.TextOnBackgroundColor)
            : _theme.GetColor(BaseTheme.ColorName.DisabledTextOnBackgroundColor);

	public static readonly BindableProperty TextProperty = BindableProperty.Create(
		nameof(Text), typeof(string), typeof(SettingTextRadialProgressCell), string.Empty);

	public string Text
	{
		get { return (string)GetValue(TextProperty); }
		set { SetValue(TextProperty, value); }
	}

... and other properties ... 

Now my Message is send and received
the OnPropertyChanged(); is called

but in the protected override void OnPropertyChanged... I only get:

• "BackgroundColor" once
• ".ctor" once

and that's it.
".ctor" I can understand - the OnPropertyChanged() is called without a name and so the [CallerName] ist used which might be correctly the Constructor in this case

So I've tried OnPropertyChanged(string.Empty) too:

• got once "BackgroundColor"
• got once "" (an empty string)
  That's it

Calling OnPropertyChanged(null) causes some exception then

So:
Is OnPropertyChanged not suitable for informing every property of that class?
Is this a Bug and is there a Workaround?
Or is this intended and how should I inform all properties now?

I mean, in this article
https://learn.microsoft.com/en-us/dotnet/api/system.componentmodel.inotifypropertychanged.propertychanged?view=net-9.0
it says:

The PropertyChanged event can indicate all properties on the object have changed by using either null or String.Empty as the property name in the PropertyChangedEventArgs.

But not for ContentView anymore?