I have a radgrid and when I scroll down it throws this error, but I'm not sure where the error is coming from or how I can help resolve it.

This is a UWP app and I'm debugging in VS 2017 15.3 on windows 10 creators edition.

System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at Telerik.UI.Xaml.Controls.Grid.IndexStorage.ValueForIndex(Int32 index, Boolean approximate)
   at Telerik.Data.Core.Layouts.CompactLayout.UpdateAverageLength(Int32 startIndex, Int32 endIndex)
   at Telerik.UI.Xaml.Controls.Grid.NodePool`2.MeasureVertically(RadSize availableSize, Double offset, Double bufferScale)
   at Telerik.UI.Xaml.Controls.Grid.NodePool`2.OnMeasure(RadSize availableSize, Double offset, Int32 frozenEleme

Available in the R1 2018 release. 

Ability to export to Excel/PDF from grid. Any idea when this would be available? 

Hi, just wondering - is the source code the the sample UWP demo app available? I'm referring to UI for UWP Demos app that is available in the windows app store.

Available in the R1 2018 release. The code could be found on the following link: 
https://github.com/telerik/UI-For-UWP-Demos

ListView: Expose setter for SelectedItem property and implement it, so that setting this property applies the corresponding style to the selected item.

Declined: The SelectedItem property has public setter. Setting it makes the style be applied as expected on the item.

Allow the user to define axis ticks origin value. E.g. with Min=-10, Max=100, MajorStep=25, the user should be able to define that the axis will have ticks and labels at 0, 25, 50, 75 and 100 while keeping the minimum value of -10 in range.

Cannot use spaces in editors within groups.
Instead space triggers expand/collapse state

Range is rendered incorrectly when using negative range values.

Implement a feature which will allow users to change the trigger which updates the source in Editing Mode

After multiple control reload the memory is not released.

Declined: Currently UWP does not have an ImageEditor control. On the following link you can find a feature request where you can vote for introducing such a control and track its status: https://feedback.telerik.com/Project/167/Feedback/Details/201118-new-control-image-editor-port-to-uwp