Invalid update: invalid number of items in section 8. The number of items contained in an existing section after the update (16) must be equal to the number of items contained in that section before the update (16), plus or minus the number of items inserted or deleted from that section (1 inserted, 0 deleted) and plus or minus the number of items moved into or out of that section (0 moved in, 0 moved out). Collection view: <TKCollectionView: 0x7fe80a09a400; baseClass = UICollectionView; frame = (0 0; 392 642); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x6000020144e0>; backgroundColor = UIExtendedGrayColorSpace 0 0; layer = <CALayer: 0x6000027f0700>; contentOffset: {0, 2985.3333333333335}; contentSize: {392, 4200}; adjustedContentInset: {0, 0, 0, 0}; layout: <TKListViewLinearLayout: 0x7fe8099545d0>; dataSource: <Telerik_Maui_Controls_Compatibility_DataControlsRenderer_iOS_TKExtendedListView: 0x7fe80920bde0; frame = (0 0; 392 642); backgroundColor = UIExtendedGrayColorSpace 0 0; layer = <CALayer: 0x6000027f0300>>>

<telerik:RadListView ItemsSource="{Binding SourceItems}"
                     x:Name="listView"
                     VerticalScrollBarVisibility="Always"
                     FilterDescriptors="{Binding FilterDescriptors, Mode=OneWayToSource}"
                     IsLoadOnDemandEnabled="{Binding LoadOnDemandEnabled}"
                     LoadOnDemandBufferItemsCount="50"
                     LoadOnDemandMode="Automatic"
                     IsLoadOnDemandActive="{Binding LoadOnDemandActive}"
                     ItemTapped="OnItemSelected">
    [...]
</telerik:RadListView>

namespace MyApp.ViewModels
{
    public partial class SearchViewModel : ObservableObject
    {
        [ObservableProperty]
        public List<Shop> items;

        [ObservableProperty]
        public ObservableCollection<Shop> sourceItems;

        [ObservableProperty]
        public bool loadOnDemandEnabled = false;

        [ObservableProperty]
        public bool loadOnDemandActive = false;

        public SearchViewModel()
        {
            SourceItems = new ListViewLoadOnDemandCollection(LoadMoreShops);
        }

        public IEnumerable<Shop> LoadMoreShops(CancellationToken cancelationToken)
        {
            ObservableCollection<Shop> result = new ObservableCollection<Shop>();
            LoadOnDemandActive = true;

            try
            {
                int maxIndex = sourceItemsIndex + 50;
                int totalIndex = items != null ? items.Count : 0;
                maxIndex = Math.Min(maxIndex, totalIndex);

                if (maxIndex > sourceItemsIndex)
                {
                    for (int i = sourceItemsIndex; i < maxIndex; i++)
                    {
                        result.Add(Items[i]);
                    }
                }
                else
                {
                    LoadOnDemandEnabled = false;
                    return null;
                }

                sourceItemsIndex = maxIndex + 1;
                LoadOnDemandActive = false;
                return result;
            }
            catch (Exception ex)
            {
                //exception is thrown when the task is canceled. Returning null does not affect the ItemsSource.
                LoadOnDemandActive = false;
                return null;
            }
        }
    }
}

<telerik:TabViewItem HeaderText="Header">
	<Grid BackgroundColor="AliceBlue" RowDefinitions="*,*,*">
		<Label
			Grid.Row="0"
			BackgroundColor="Orange"
			HorizontalTextAlignment="Center"
			Text="Label With Gesture Recognizer (not working on Android)">
			<Label.GestureRecognizers>
				<TapGestureRecognizer />
			</Label.GestureRecognizers>
		</Label>
		<Label
			Grid.Row="1"
			BackgroundColor="AliceBlue"
			HorizontalTextAlignment="Center"
			Text="Label No Gesture Recognizer (works)" />
	</Grid>
</telerik:TabViewItem>

<telerik:TabViewItem HeaderText="Log graph">
	<Grid BackgroundColor="Orange" RowDefinitions="*,*">
		<Grid.Resources>
			<ResourceDictionary>
				<x:Array x:Key="TestData" Type="{x:Type Color}">
					<Color>Aqua</Color>
					<Color>Black</Color>
					<Color>Blue</Color>
					<Color>Fuchsia</Color>
					<Color>Gray</Color>
					<Color>Green</Color>
				</x:Array>
			</ResourceDictionary>
		</Grid.Resources>
		<CollectionView BackgroundColor="Purple" ItemsSource="{StaticResource TestData}">
			<CollectionView.ItemTemplate>
				<DataTemplate>
					<BoxView HeightRequest="50" Color="{Binding}" />
				</DataTemplate>
			</CollectionView.ItemTemplate>
		</CollectionView>
		<Label
				Grid.Row="1"
				BackgroundColor="Red"
				Text="this works" />
	</Grid>
</telerik:TabViewItem>

<telerik:RadListPicker x:Name="WorkflowPicker" Placeholder="Select Workfow" ItemsSource="{Binding Workflows, Mode=TwoWay}" DisplayMemberPath="Name" PickerMode="DropDown" IsLooping="False" WidthRequest="300" Margin="3" BackgroundColor="Transparent" SelectedItem="{Binding SelectedWorkflow}">
                <telerik:RadListPicker.DropDownSettings>
                    <telerik:PickerDropDownSettings AcceptCommand="{Binding OnWorkflowsPickerAcceptRelay}" CancelCommand="{Binding WorkflowsPickerCancelCommand}" />
                </telerik:RadListPicker.DropDownSettings>
                <telerik:RadListPicker.ItemTemplate>
                    <DataTemplate>
                        <Label Text="{Binding Name}" HorizontalTextAlignment="Start" VerticalTextAlignment="Center"/>
                    </DataTemplate>
                </telerik:RadListPicker.ItemTemplate>
            </telerik:RadListPicker>

public ICommand WorkflowsPickerCancelCommand { private set; get; }

public MainPageViewModel()
{
    this.WorkflowsPickerCancelCommand = new Command(this.OnWorkflowsPickerCancel);        
}

private void OnWorkflowsPickerCancel(object obj)
{
    // This fires        
}

[RelayCommand]
private void OnWorkflowsPickerAcceptRelay(object obj)
{
    // This does not fire
}