No line drawn when all values for the series are the same, very near 0, float value

We have been testing different limits of data types we are aiming to draw to the chart, and have found that if all of the values in a series are the same, very near 0, float value, then the line isn’t drawn. We do, however, get the value showing up on the vertical line annotation.

Though we are not using the latest version of SciChart in our production app (Net 4.6.1 requirement, but upgrading that soon), I have managed to reproduce the same in a very simplified .Net7 app using the latest version (7.0.2.27161). I have attached both the test app (with my runtime key removed) and a screenshot of the app.

Here is the code we are using to generate the sample series in the code behind of MainWindow.xaml:

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        this.Loaded += OnLoaded;
    }

    private void OnLoaded(object sender, RoutedEventArgs routedEventArgs)
    {
        var floatData = new XyDataSeries<double, float>();

        for (var i = 0; i < 1000; i++)
        {
            floatData.Append(i, float.Parse(Math.Pow(2, -126).ToString("E")));
        }

        this.FloatSeries.DataSeries = floatData;
    }
}

MainWindow.xaml contains just a SciChart Surface, as follows:

<s:SciChartSurface x:Name="Surface">
            <s:SciChartSurface.RenderableSeries>
                <s:FastLineRenderableSeries x:Name="FloatSeries" 
                                            Stroke="#FF4083B7"/>
            </s:SciChartSurface.RenderableSeries>

            <s:SciChartSurface.XAxis>
                <s:NumericAxis AutoRange="Always"/>
            </s:SciChartSurface.XAxis>

            <s:SciChartSurface.YAxis>
                <s:NumericAxis AutoRange="Always"/>
            </s:SciChartSurface.YAxis>

            <s:SciChartSurface.ChartModifier>
                <s:ModifierGroup>
                    <s:RubberBandXyZoomModifier />
                    <s:ZoomExtentsModifier />

                    <s:VerticalSliceModifier>
                        <s:VerticalSliceModifier.VerticalLines>
                            <s:VerticalLineAnnotation X1="500" 
                                                      IsEditable="True"
                                                      LabelTextFormatting="E"
                                                      Stroke="White" />
                        </s:VerticalSliceModifier.VerticalLines>
                    </s:VerticalSliceModifier>
                </s:ModifierGroup>
            </s:SciChartSurface.ChartModifier>

            <s:SciChartSurface.Annotations>
                <s:TextAnnotation Text="Test app highlighting problem when all x values are floats with the same scientific value"
                                  CoordinateMode="Relative"
                                  X1="0" 
                                  Y1="0"
                                  Margin="2"/>
            </s:SciChartSurface.Annotations>
        </s:SciChartSurface>

Adding another value to the series with result in the line being drawn, as long as it is sufficiently different to the others.

What would be the best way to get this data showing to the users? Whilst highly unlikely the user is going to use such values, we cannot discount this. Would extending the ViewportManager to provide our own range be the best approach? If it impacts on the suggestions, due to our implementation requirements our production app will only show up to two series per surface (with the same data type), but we could be showing upwards of 256 charts (with one of 12 data types as their y-axis type). All of our charts are linked to a common TimeSpanAxis for the x axis.