Snackbar DeactivateStoryboardCompletedEvent Bug

I think this is a bug...

.../MaterialDesignThemes.Wpf/Snackbar.cs

     public static readonly RoutedEvent DeactivateStoryboardCompletedEvent = EventManager.RegisterRoutedEvent(
            nameof(DeactivateStoryboardCompleted), RoutingStrategy.Bubble, typeof(SnackbarMessageEventArgs), typeof(Snackbar));

        public event RoutedPropertyChangedEventHandler<SnackbarMessage> DeactivateStoryboardCompleted
        {
            add => AddHandler(DeactivateStoryboardCompletedEvent, value);
            remove => RemoveHandler(DeactivateStoryboardCompletedEvent, value);
        }

        private static void OnDeactivateStoryboardCompleted(IInputElement snackbar, SnackbarMessage message)
        {
            var args = new SnackbarMessageEventArgs(DeactivateStoryboardCompletedEvent, message);
            snackbar.RaiseEvent(args);
        }

Prompt type mismatch when I register events...

I didn't look at all the code. Maybe it's right?

        public static readonly RoutedEvent DeactivateStoryboardCompletedEvent = EventManager.RegisterRoutedEvent(
            nameof(DeactivateStoryboardCompleted), RoutingStrategy.Bubble, typeof(RoutedPropertyChangedEventHandler<SnackbarMessageEventArgs>), typeof(Snackbar));

        public event RoutedPropertyChangedEventHandler<SnackbarMessageEventArgs> DeactivateStoryboardCompleted
        {
            add => AddHandler(DeactivateStoryboardCompletedEvent, value);
            remove => RemoveHandler(DeactivateStoryboardCompletedEvent, value);
        }

        private static void OnDeactivateStoryboardCompleted(IInputElement snackbar, SnackbarMessage message)
        {
            var snackbarMessageEventArgs = new SnackbarMessageEventArgs(DeactivateStoryboardCompletedEvent, snackbar, message);
            var args = new RoutedPropertyChangedEventArgs<SnackbarMessageEventArgs>(snackbarMessageEventArgs, snackbarMessageEventArgs, DeactivateStoryboardCompletedEvent);
            snackbar.RaiseEvent(args);
        }

Comienza en MaterialDesignThemes.Wpf/Snackbar.cs e inspecciona conjuntamente el registro del evento DeactivateStoryboardCompleted, la declaración del delegado y la llamada a OnDeactivateStoryboardCompleted. Comprueba los tipos de eventos enrutados de WPF implicados y compila el proyecto para confirmar que la discrepancia de tipos notificada se ha resuelto sin introducir otro error en la firma del evento.