WPF Crashing on DeselectAllPointMarkers

Hi, i’m developing an app in WPF and i found that it crashes when i’m dereferencing the user control where my chart lives in and have 1 or more points selected by code in one chart when the other one is not visible.

i would be very apreciated if someone could tell me a hint of where i have to look for the solution or what do this methods do or touch.

more data about the chart:

• I have 2 fastlinerenderable series each with 2 Yaxis for itselves and 2 shared XAxis.
• I also have a modified listbox which is have it’s sincronization synced to the chart.
• have a modifiergroup to pan,zoom and select.

this is my Selectionmodifier:

<scicharts:DataPointSelectionModifier
                        Name="ChartSelection"
                        SelectionFill="#B1B5B2B2" 
                        XAxisId="{Binding XAxisType, NotifyOnTargetUpdated=True}"
                        TargetUpdated="ChartSelection_TargetUpdated"
                        SelectionStroke="#009E9C9C"
                        IsEnabled="{Binding SelectionMode}" >

I think that this is the axis that breaks my program but it needs it to not crash when i select.

this is my stacktrace:

An unhandled exception of type ‘System.NullReferenceException’ occurred in SciChart.Charting.dll

en SciChart.Charting.ChartModifiers.DataPointSelectionModifier.DeselectAllPointMarkers()
en SciChart.Charting.ChartModifiers.DataPointSelectionModifier.OnXAxisIdDependencyPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

I tried to make a program that could replicate the error but i couldn’t.

thanks in advance.