OxyPlot Lineseries doesnt draw first 50 points

Hi! I draw a simple LineSeries with 480 data points in Oxyplot. But for some reason the first 50 points are not drawn but can be marked.

I am using Visual Studio 2017 Windows 10 universal app.


Also when i zoom in or out and move the curve with mouse buttons. The curve is drawn anywhere in the app not only in the Oxyplot box.