I am facing 2 issues with the CollectionView:

1. I have given RemainingItemsThreshold="0" for CollectionView, but the RemainingItemsThresholdReached event is firing before reaching the last item. It is calling around 6 items before the last item.
2. WhenRemainingItemsThresholdReached is fired, I load the next set of data and append it to the CollectionView. But at that time, the CollectionView is scroll to the first item. It is not stay on the last item where we load more data.

My CollectionView Code:

<CollectionView 
    x:Name="MyTweetsList" 
    Margin="0,5,0,5"
    IsVisible="{Binding chatVisibility}"
    ItemsSource="{Binding AllItems,Mode=TwoWay}"
    RemainingItemsThreshold="0"
    RemainingItemsThresholdReached="LoadMoreTweets"
    HorizontalOptions="Fill">
    <CollectionView.ItemTemplate>
        <DataTemplate>
            <StackLayout
            x:Name="Item"
            HorizontalOptions="Fill"
            VerticalOptions="FillAndExpand"
            Orientation="Vertical">

               
            </StackLayout>
        </DataTemplate>
    </CollectionView.ItemTemplate>
    <CollectionView.HeightRequest>
        <OnIdiom x:TypeArguments="x:Double">
            <OnIdiom.Phone>400</OnIdiom.Phone>
            <OnIdiom.Tablet>600</OnIdiom.Tablet>
            <OnIdiom.Desktop>400</OnIdiom.Desktop>
        </OnIdiom>
    </CollectionView.HeightRequest>
</CollectionView>