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UWP: Exception attempting to set PrimaryAxis.TrackballLabelStyle.AxisLabelAlignment

Only occurs on UWP target, found when updated to latest version (from 16.4.0.52 which works fine).

Setting PrimaryAxis.TrackballLabelStyle.AxisLabelAlignment throws a NullReferenceException.

To test I created a plain Xamarin Forms app in VS 2017.  Added a single SfChart control to the main window.

<syncFusion:SfChart x:Name="Chart" HeightRequest="200" WidthRequest="400" />

In the code-behind constructor:

Chart.PrimaryAxis = new DateTimeAxis();
Chart.PrimaryAxis.TrackballLabelStyle.AxisLabelAlignment = ChartLabelAlignment.Near;

Will throw exception when constructor returns, I assume when the control is rendered.  Callstack attached.

Actual code sets this property sometime later and this still throws the same exception.