Excuse me for not seeing this earlier.
I believe that the cause of the problem is that the RadChartView internally sets the visibility of its visual elements in code. If an element is outside of the visible plot area its visibility is set to collapsed, and if it is in range its visibility is set to visible. This occurs when something causes the chart layout to be updated.
The solution to this is to use the opacity property, instead of the visibility. I have attached a modified version of the previous project to demonstrate this.
the Telerik team