TelerikChartAxisBorderBrush is not applied when setting in Dark Light ThemeResources from the Telerik Theme Resources https://docs.telerik.com/devtools/universal-windows-platform/common/teleriknamedbrushes 

When you have several series(ScatterLineSeries reported but it happens with others as well) in the RadCartesianChart and you clear the Items of one of them by calling the Clear() method - the line is not redrawn and it shows the old data. 

When using shp and dbf files with ~130MB size, it takes minutes to load the map

See this Screencast for a short video of the issue at runtime: https://www.screencast.com/t/YXm6xOtO 

Here's the code to reproduce: 

<grid:RadDataGrid ItemsSource="{x:Bind ViewModel.DataItems, Mode=OneWay}"
                  UserGroupMode="Disabled"
                  UserFilterMode="Disabled"
                  UserColumnReorderMode="None"
                  UserSortMode="None"
                  AutoGenerateColumns="False"
                  GridLinesVisibility="Horizontal">
    <grid:RadDataGrid.Columns>
        <grid:DataGridNumericalColumn Header="1"
                                      PropertyName="Key"
                                      SizeMode="Auto" />
        <grid:DataGridTextColumn Header="2"
                                 PropertyName="First"
                                 SizeMode="Auto" />
        <grid:DataGridTextColumn Header="3"
                                 PropertyName="Second"
                                 SizeMode="Auto" />
        <grid:DataGridTextColumn Header="Stretchy"
                                 PropertyName="Stretch"
                                 SizeMode="Auto" />
        <grid:DataGridTextColumn Header="5"
                                 PropertyName="SecondLast"
                                 SizeMode="Auto" />
        <grid:DataGridTextColumn Header="6"
                                 PropertyName="Last"
                                 SizeMode="Auto" />
        <grid:DataGridNumericalColumn Header="7"
                                      PropertyName="Count"
                                      SizeMode="Auto" />
    </grid:RadDataGrid.Columns>
</grid:RadDataGrid>

See this forum thread for reproducible and workaround: http://www.telerik.com/community/forums/legend-will-only-display-labels-(windows-10)

The uwp radlistview vertical scrollbar disappears when focus is lost -
I think I need something like 
https://www.telerik.com/forums/listview-width-with-or-without-vertical-scrollbar
 <telerik:RadListView.Commands. ListElement.Scroller.Scrollbar.FillElement.Visibility

But I may be missing something?

Testing the Telerik RadialMenu control in the UWP app ,  when you click on the radialmenu the control flickers for the mouseclick event on desktop.  plse consider changing the "flicker" to something more like a keypress , a image blur or something else. Or slow down the flicker considerable , your effect looks more like a defect of image rendering at the moment. 

EDIT, Cancel and Save strings cannot be localized through LocalizationManager.

Using Textbox in CellTemplate with UpdateSourceTrigger=PropertyChanged result in caret position jumps to beginning and thus the date recorded is reversed e.g. 321 instead 123.

In a scenario where you have lots of columns so that a horizontal scrollbar is present and you try to resize columns which are not visible at the beginning(need to scroll to view them) ->  the resizing is not working as expected and the view is jumping.