DataPointSelectionModifier not selecting points with CategoryDateTimeAxis x-axis for points with same date

I have a chart with a CategoryDateTimeAxis x-axis, some of the data points that have the same date can’t be selected, and I noticed if I add points that have a different date, the selection works as expected.

It seems that the DataPointSelectionModifier.SelectionChanged even is fired but the DataPointSelectionModifier.SelectedPointMarkers collection is empty

private void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
// Create the X and Y Axis
var xAxis = new CategoryDateTimeAxis() { AxisTitle = "Date", TextFormatting = "dd/MM/yyyy" };
var yAxis = new NumericAxis() { AxisTitle = "Value" };

var selectionModifier = new DataPointSelectionModifier()
{
ReceiveHandledEvents = true,
AllowsMultiSelection = false,
ExecuteOn = ExecuteOn.MouseLeftButton,
UseLayoutRounding = true
};

selectionModifier.SelectionChanged += SelectionModifier_SelectionChanged;

SciChartSurface.XAxis = xAxis;
SciChartSurface.YAxis = yAxis;

SciChartSurface.ChartModifier = new ModifierGroup(
new RubberBandXyZoomModifier(),
new ZoomExtentsModifier(),
selectionModifier);

var series = new XyDataSeries<DateTime, double>();

for (int i = 0; i < 20; i++)
{
    var date = i < 10 ? DateTime.Now.AddDays(i) : DateTime.Now.AddDays(10);
    series.Append(date, i, new SelectedPointMetadata());
}

var renderableSeries = new FastLineRenderableSeries()
{
    DataSeries = series,
    XAxis = xAxis,
    YAxis = yAxis,
    PointMarker = new EllipsePointMarker() { Width = 10, Height = 10, Fill = Colors.Red },
    SelectedPointMarker = new EllipsePointMarker() { Width = 10, Height = 10, Fill = Colors.Green },
};
SciChartSurface.RenderableSeries.Add(renderableSeries);
}

private void SelectionModifier_SelectionChanged(object? sender, EventArgs e)
{

if (sender is not DataPointSelectionModifier dataPointSelectionModifier)
{
    return;
}

var dataPointInfo = dataPointSelectionModifier.SelectedPointMarkers.FirstOrDefault();
if (dataPointInfo is null)
{
    return;
}

var metaData = dataPointInfo.DataPointMetadata as SelectedPointMetadata;

}
}

public class SelectedPointMetadata : IPointMetadata
{
public event PropertyChangedEventHandler PropertyChanged;
public bool IsSelected { get; set; }
}