All the 2D Line Charts on a TabControl seem to share one axis between all tabs.

I want to put multiple Line Charts on a standard WPF TabControl. One Chart per tab.
Each tab should show a different chart with, in general, a different range on its X axis.
After a chart on a tab has been panned or zoomed, then after switching to another tab and then returning to the original tab, then the original X axis values should be preserved.
My problem is that I end up with a behaviour that looks like all the charts share one X axis.

So my question is how can I achieve the desired behaviour?
I did try databinding XAxis and, later, XAxes, but I ended up with the same behaviour.
Thanks in advance to anyone that can help me out with this.

Here is the briefest example I could construct that displays the problem.
It simply displays 3 tabs with different ranges of X values and AutoRange set to “Once”.
When it runs, all 3 charts are displayed with the same X axis range which is only correctly autoranged for the first tab.
The attached images are screenshots of the three tabs.

Here is my XAML:

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:SciTest" xmlns:s="http://schemas.abtsoftware.co.uk/scichart" x:Class="SciTest.MainWindow"
    Title="MainWindow" Height="300  " Width="500">
<Window.DataContext>
    <local:RSeriesSourceList/>
</Window.DataContext>


<DockPanel>
    <TabControl ItemsSource="{Binding}">
        <TabControl.ItemTemplate>
            <!--This dictates what goes in the Tab header-->
            <DataTemplate>
                <TextBlock Text="{Binding Title}" />
            </DataTemplate>
        </TabControl.ItemTemplate>
        <TabControl.ContentTemplate>
            <!--This dictates what goes in the tab page-->
            <DataTemplate>
                <s:SciChartSurface RenderableSeries="{Binding RSeries}">
                    <s:SciChartSurface.XAxes>
                        <s:NumericAxis/>
                    </s:SciChartSurface.XAxes>
                    <s:SciChartSurface.YAxes>
                        <s:NumericAxis AutoRange="Always"/>
                    </s:SciChartSurface.YAxes>
                </s:SciChartSurface>
            </DataTemplate>
        </TabControl.ContentTemplate>
    </TabControl>
</DockPanel>

And here is the code-behind for the Data Context

    class RSeriesSource
{
    public String Title { get; set; }
    public ObservableCollection<IRenderableSeries> RSeries{get;set;}
    static Random rnd = new Random(); //for generating example data
    public RSeriesSource()
    {
        RSeries = new ObservableCollection<IRenderableSeries>();
    }
    public static RSeriesSource Example(int n)
    {
        RSeriesSource res = new RSeriesSource();
        res.AddRS(n);
        res.Title = "S" + n.ToString();
        return res;
    }

    FastLineRenderableSeries AddRS(int offset)
    {
        XyDataSeries<Double, Double> Series = new XyDataSeries<Double, Double>();
        for (int ix = 0; ix < 10; ix++)
        {
            Series.Append(offset * 5 + ix, offset + rnd.NextDouble());
        }
        FastLineRenderableSeries res = new FastLineRenderableSeries();
        res.DataSeries = Series;
        //if (yAx != null)
        //    res.YAxisId = yAx.Id; //Use the Id NOT the axis
        RSeries.Add(res);
        return res;
    }
}

class RSeriesSourceList : ObservableCollection<RSeriesSource>
{
    public RSeriesSourceList()
    {
        for (int i = 0; i < 3; i++)
        {
            Add( RSeriesSource.Example(i));
        }
    }
}