Xamarin.Forms中的数据绑定ListView似乎在UWP中不起作用

Question

以下是相关代码：

public class SelectClientPage : ContentPage
{
    public SelectClientPage(ClientResult[] clients)
    {
        this.BindingContext = new SelectClientViewModel(this, clients);

        var layout = new StackLayout { Padding = 20 };

        var list = new ListView
        {
            ItemTemplate = new DataTemplate(typeof(ClientListTemplate)),
            BackgroundColor = MobileColor.LightOrigamiBlue.ToFormsColor(),
            HasUnevenRows = true,
        };
        list.SetBinding(ListView.ItemsSourceProperty, "Clients");
        list.SetBinding(ListView.SelectedItemProperty, "SelectedItem");

        layout.Children.Add(list);

        this.Padding = new Thickness(0, Device.OnPlatform(20, 0, 0), 0, 0);
        this.Content = layout;
    }

    public class ClientListTemplate : ViewCell
    {
        protected override void OnBindingContextChanged()
        {
            ClientResult client = (ClientResult)this.BindingContext;
            var pad = new ContentView {
                Padding = new Thickness(5,5),
                Content = new Label 
                { 
                    Text = client.name,
                    TextColor = Color.White,
                    FontSize = Device.GetNamedSize(NamedSize.Medium, typeof(ListView))
                }
            };
            this.View = pad;
        }
    }
}

public class SelectClientViewModel : ViewModelBase
{
    public SelectClientViewModel(Page page, ClientResult[] clients) : base(page)
    {
        this._Clients = clients;
    }

    private ClientResult[] _Clients;
    public ClientResult[] Clients { get { return _Clients; } }

    private object _SelectedItem = null;
    public object SelectedItem
    {
        get { return _SelectedItem; }
        set { this.SetProperty(ref _SelectedItem, value); }
    }

    //... rest truncated //
}

此代码在iOS或Android中运行良好。但是，在UWP中，它在ClientListTemplate类的这一行中失败：

ClientResult client = (ClientResult)this.BindingContext;

它失败的原因是因为传入ViewCell的BindingContext是SelectClientViewModel类型，它最初被分配给内容页面的BindingContext。因此它会抛出一个无效的强制转换异常。

还有其他人遇到过这个吗？我是关于Xamarin.Forms v2.3.3.175。

感谢。