Hi,

I rolled my app with the ListView out to production and are getting 8+ crashes a day from 140 users with the above issue. I have included a stack trace. I cannot find the steps to reproduce the issue in development. I have rolled back to using the native ListView as this does not crash the app.

Attached is an example project to see what I am doing in general terms, but I have not been able to reproduce this crash in it.

My guess is that a DataTemplate is not being cleaned up properly and when the data behind is changed it attempts to access the control that represented the data in the DataTemplate.

Regards
Anthony

Provide an easy way to position the popup in the center of the screen in a MVVM-friendly manner. 

Consider the case when the target is a view that carries information about the popup and cannot be the page.

Please refer to the attached project that reproduces the issue. In the MainPage constructor, you can switch between using the PickerEditor (validation works) and the SegmentedEditor (validation doesn't work).

If you have a Chart with BarSeries and TooltipBehavior defined, the tooltip of each bar is shown only when the user taps in the area around the tip of the bar.

The expected behavior is the tooltip to be displayed when clicking anywhere on the bar.

Provide support for Interactive Forms (AcroForms) in the PDF Viewer for Xamarin.

For detailed information on Interactive Forms concept check below: 
https://docs.telerik.com/devtools/document-processing/libraries/radpdfprocessing/model/interactive-forms/overview

When RadCalendar is inside Xamarin Forms Tabbed Page. Switching between tabs triggers Calendar SelectionChanged and the calendar DisplayDate is changed. 

Workaround:
the issue could not be reproduced when RadTabView is used and its IsContentPreserved property is set to true.

Request

Android follows a "bottom-up" approach to gesture/touch handling. It would be nice if the RadSlideView would allow any swipe gesture that it cannot handle itself to propagate upwards so that another view can have a chance to handle it.

Example

Given the following XAML:

<ParentView>
        <ParentView.GestureRecognizers>
            <SwipeGestureRecognizer Direction="Left"
                                    Command="{Binding ForwardCommand}" />
            <SwipeGestureRecognizer Direction="Right"
                                    Command="{Binding BackwardCommand}" />
        </ParentView.GestureRecognizers>

        <RadSlideView />
</ParentView>

Expectation:

• When the user is at the beginning of the items in the RadSlideView and swipes right, then the BackwardCommand should execute. (The RadSlideView should detect that it is at the beginning of its item source and allow the right swipe gesture to propagate upwards to the ParentView.)
• When the user is at the end of the items in the RadSlideView and swipes left, then the ForwardCommand should execute. (The RadSlideView should detect that it is at the end of its item source and allow the left swipe gesture to propagate upwards to the ParentView.)

The pdf content is not visualized properly on UWP and iOS when the file is loaded from a stream. 

Also if you try to load PDF twice on the same PDF Viewer, an exception is raised.