When you have set a group header template to the ListView and you rotate the Android device from Portrait to Landscape, the group headers that fail within the visible field are cut off.

Edit: Avalable in R3 2017 SP release.

The grouping does not work in Android if you do not use simple type properties to group the items. In UWP everything works fine, in iOS I have not tested the scenario. I added a demo solution to test the issue.

Available in the R2 2018 release.

Provide API which enables the group headers to remain in the view when scrolling until the next ones push them away.

Add support for header and footer that scroll with the content of the list view.

Example:
<telerikListView:ListViewItemStyle BackgroundColor="{DynamicResource MedLightGrey}" BorderColor="{DynamicResource LightGrey}" BorderWidth="1" BorderLocation="Bottom"/>

Available in the R2 2017 PS release

On Android the header items are taking too much space and are invisible using GroupHeaderTemplate.

Available in minor release 2017.2.0602. It will also be available in the R2 2017 SP release.

Currently groupheader can be stretched by using GroupHeaderLength property instead rather than resolving it automatically.

When Automatic LoadOnDemandBehavior is added to the ListView and the user try to scroll while new items are still loading the app crashes.

Available in the R2 2017 PS release.

If EndItemSwipe() is called inside the ItemSwiping event handler, the ItemSwiping event continues to occur on iOS until the user physically ends the swipe gesture.

On UWP and Android the item can be swiped beyond the SwipeOffset property. Add option to restrict the swiped distance to the SwipeOffset value.

When the ItemSwipeStartingEventArgs.Cancel property is set to true:
Android: NullPointerException
UWP: cell content disappears

Implement caching of images on Android.

Provide GroupItem tapped event and unify the life cycle of item tapped. Currently, item tapped is raised on Android but not on iOS.

Available in the R1 2018 SP release.

More information: https://docs.telerik.com/devtools/xamarin/controls/listview/features/listview-features-events

Provide a notification mechanism when the user holds on a specific item.

Available in the R1 2018 SP release. More information: https://docs.telerik.com/devtools/xamarin/controls/listview/features/listview-features-events

This can be reproduced in the SDK examples ->ListView -> Gestures -> CellSwipeEvents. 
1. Change the content of the items so that they have uneven height
2. Scroll down 
3. Delete an item by swiping
-> Expected result : The items re-arrange correctly
-> Actual result : The item is deleted but the ListView is scrolled up when the UI is updated

Available in the R2 2017 PS release

Enable easier access to selected items in the Viewmodel in MVVM scenarios through bindable readonly property.

Available in minor release 2017.2.0721. It will also be available in the R3 2017 release.

Expose API allowing users to change the style of the dragged item(s).

Available in the R1 2018 SP release.
More information you can find here: 
https://docs.telerik.com/devtools/xamarin/controls/listview/features/listview-features-events
https://docs.telerik.com/devtools/xamarin/controls/listview/features/listview-features-styling