When the IsOpen is set initially to true, on iOS the main content overlay does not display:

For Chart with ScatterLineSeries, in case the ItemsSource contains points with following sample horizontal values: 0, 2, 4, 6, 8, 6, 4, 2, 0, ZoomBehavior does not work correctly on iOS  - when ZoomMode is set to "Both", the  points are taken in incorrect order and the result is a zig-zag chart.

When Group Header template is used and the visibility of an element in the template is changed, the template does not recreate as expected. 

For example add entry /editor in the template and change its visibility

On iOS the editor/entry overlaps the group header and cannot type in it.

On UWP : The editor is visualized as expected but then we change its visibility to false, the space for the editor is still visible. The group header does not layout as expected.

Solution:

You have to collapse/expand the group header so the template in the group header to layout as expected

Telerik.UI.for.Xamarin NuGet package is missing Telerik.UI.for.Xamarin.Documents.Fixed.FormatProviders.Image.Skia package reference.

There is a slow performance when scrolling, expand/collapse items when the ListView Groups are sticky and GroupHeaderTemplate is used. 

Workaround: 
1. Set IsGroupHeaderStickty to false. 

or

2. Use the default group header template

When a popup is attached to a content page with a PresentationMode of modal the popup does not show when binding changes on iOS.  It does work on Android.

All parts of the TreeViewItem (indicator, text, checkbox) are defined as one big template. Therefore customization of only one part of the template still requires retemplating the whole item. 

When retemplating is applied to the treeviewitem and  20+ children in the nodes are loaded, the result is as follow: If you run that on iOS and expand a node you'll see that it crunches the UI for a few seconds and then loads the child nodes, but i also see on our application that it will crash some times and either way gives a bad feel to the UI on iOS

When there are items in the Figures collection of a RadPathGeometry, and the Clear() method of the collection is called - an exception is thrownl.

When placing and RadEntry in Popup, Object disposed exception is thrown. 

The issue cannot be reproduced with Telerik UI for Xamarin version 2022.2.624.1

Workaround until a fix for this issue is provided: 

1. Use Telerik UI for Xamarin version 2022.2.624.1

or:

2. Use Xamarin.Forms Entry instead.

The ListView items are not rendered correctly when manual load on demand is used.

The ComboBox SelectedItems are not displayed in the input, when binded dynamically inside RadListView cell and navigation is performed. 

when setting a TimeLineBackgroundColor to MultiDayView,  it is not respected on iOS. https://docs.telerik.com/devtools/xamarin/controls/calendar/images/calendar_scheduling_timeline.png The image in the middle is on iOS. The timeline background color is not applied

Null Reference Exception is thrown when the ListView is initially grouped with more than 1 group descriptor and then the control is populated using Range Observable collection. 

When changing the CurrentUICulture to a culture which requires comma as decimal separator (for example, German) - pressing the comma key does not work. You must press period. When pressing period "." -> "," is entered.

The value of DisplayedTextFontSize is not respected when DisplayedTextFont is set on iOS.

With iOS 16 some changes are introduced to the UICollectionView. This breaks the layout of the ListView with dynamically sized items.

appointments show wrong time in different time zones due to daylight time changes.

The issue can be reproduced in scenarios:

- For US time zone 14th of march: If I click an empty slot, I have a popup that tells the time that is clicked. I click on the 9 AM slot and it says I'm clicking on "10:00". This only happens on 3/14/2021

- For European countries time zone: on 28th or march 2021 when is the daylight saving time

Drop-down freezes when double tap (using the track pad), or double click in the combo at a very bottom of the control. 

The drop-down cannot be closed and the combo cannot be used

Some Image XObjects are imported but not displayed in PdfViewer.

Occasionally the DataGrid horizontal scrolling does not work properly after changing its ItemsSource.  Still, tapping on any item, make it possible to scroll again.