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Observable Collection in Blazor DataGrid Component - When adding a range, data updates no longer work

Referring to this example: https://blazor.syncfusion.com/demos/datagrid/observable-binding

When extending the ObservableCollection and using a function like so:

public void AddRange(IEnumerable<T> items)
{
    foreach (var item in items)
    {
        Items.Add(item);
    }

    OnPropertyChanged(new PropertyChangedEventArgs("Count"));
    OnPropertyChanged(new PropertyChangedEventArgs("Item[]"));
    OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, items));
}


The grid properly recognizes that the new records were added, but the INotifyPropertyChanged functionality no longer works. It's still using all of the proper OnPropertyChanged and OnCollectionChanged events which I'm assuming the grid is listening to.