我将 Xamarin.Forms 5 与 Community Toolkit 1.02 一起使用。Expander似乎可以很好地处理正文中的静态内容，但是当我添加内容的CollectionView底部时，内容的底部被截断了。
如果我滚动到最初可见的区域之外，项目就会出现。下面是我用于短动画的简化 XAML 和模型。我究竟做错了什么？
XAML：
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:xct="http://xamarin.com/schemas/2020/toolkit"
x:Class="Sandbox.Views.ExpanderPage">
<ContentPage.Content>
<xct:Expander>
<xct:Expander.Header>
<Label Text="Header" Padding="20" BackgroundColor="LightCyan"/>
</xct:Expander.Header>
<StackLayout HeightRequest="160" BackgroundColor="Aquamarine">
<CollectionView
ItemsSource="{Binding Items}"
VerticalOptions="End"
SelectionMode="Single">
<CollectionView.ItemsLayout>
<LinearItemsLayout ItemSpacing="0" Orientation="Horizontal" />
</CollectionView.ItemsLayout>
<CollectionView.ItemTemplate>
<DataTemplate>
<StackLayout
WidthRequest="160"
HeightRequest="160"
BackgroundColor="Orange"
Spacing="0">
<Label Text="{Binding Text}" BackgroundColor="LightSkyBlue"/>
<Label Text="{Binding Text}" BackgroundColor="LightSkyBlue"/>
<Label Text="{Binding Text}" BackgroundColor="LightSkyBlue"/>
<Label Text="{Binding Text}" BackgroundColor="LightSkyBlue"/>
</StackLayout>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
</StackLayout>
</xct:Expander>
</ContentPage.Content>
</ContentPage>
该模型：
public class ExpanderViewModel : BaseViewModel
{
public ObservableCollection<ExpanderItem> Items { get; }
public ExpanderViewModel()
{
Items = new ObservableCollection<ExpanderItem>() {
new ExpanderItem(){Text = "Item 1" },
new ExpanderItem(){Text = "Item 2" },
new ExpanderItem(){Text = "Item 3" },
new ExpanderItem(){Text = "Item 4" },
};
}
}
public class ExpanderItem
{
public string Text { get; set; }
}
