Ability to set a custom Trackball details DataTemplate. This would allow for two scenarios:

- Custom Styling
- Show other values alongside data point values

Add the ability to render points outside of the plot area when the data point value exceeds the explicitly set Min or Max values of the horizontal axis.

On Android and iOS, the line series will continue to extend off the plot area to a point that isn't rendered. Here's a screenshot, notice the line coming in from the left side of the plot area: https://www.telerik.com/clientsfiles/77e02115-6de0-4dd0-b572-5d5bc17a59b9_xamarin.jpg

On UWP, the beginning of the line series only starts on the first plot-able point. Here's a screenshot, notice the start of the line series: https://www.telerik.com/clientsfiles/d8c342e3-608b-40eb-95eb-8bd5e0dbc2e6_uwp.jpg 

Available in the 2018 R2 SP release.

When LabelFitMode is None,  "\n" is not taken into consideration.

Available in the R3 2018 SP release.

Available in the 2018 R2 SP release.

Currently users could modify the visual appearance of the rendered axis labels, but cannot add a custom label at a specific location.

When the Chart is zoomed, new labels are not rendered on iOS.

Available in the R3 2018 SP release.

If you have BarSeries with CombineMode set to "Stack" with zero values, the bars are placed to the maximum of the y-axis. 
As a work-around, you would need to manually adjust the Maximum value of the vertical axis.

When added in page content dynamically  RadPieChart shows its original size correctly and then coerce to 200,200 size.

DateTimeContinuousAxis displays incorrect labels when MajorStepUnit is Month. There are two labels for some months with 31 days.