Point markers, grid lines and axis tick lines are not scaled/showing at XAML rendering at high resolution

Hi,

When using the SciChartSurface.ExportToBitmapSource(useXamlRenderSurface: true) to export graph at large size for printing (e.g. at 600 DPI, when the screen is at 96 DPI), the grid lines and axis tick lines do not scale, and point markers are missing. Text, StrokeThickness of line series and legends are shown correctly.

Is it an issue in the renderer? Or is there any setting for the renderer to render them correctly?

Params of the attached graph:

LineSeriesStyle.StrokeThickness = 2,

MajorTickLineStyle.StrokeThickness = 1,
MinorTickLineStyle.StrokeThickness = 1,
MajorGridLineStyle.StrokeThickness = 1,

EllipsePointMarker.StrokeThickness = 1, Width = 6, Height = 6

Thanks,
Kawai