DisplayMemberPath of SfChipGroup does not work Completed

Suppose I have a ViewModel and class like this (get and set are omitted at ViewModel):

public class CodeItem{

    public string Value { get; set;}

    public string Name { get; set; }

}

public class ViewModel : INotifyPropertyChanged

{

    public List<CodeItem> ChipItems;

    public CodeItem Item;

}

And this XAML works fine :

<ContentPage ...>

    <ContentPage.BindingContext>

        <local:ViewModel />

    </ContentPage.BindingContext>

    <buttons:SfChipGroup Type="Choice"

                         ItemsSource="{Bindng ChipItems}"

                         DisplayMemberPath="Name"

                         SelectedItem="{Binding Item}" />

</ContentPage>

But this XAML does not work fine. Chip displays class name (like Namespace.CodeItem) instead of "Name" :

<ContentPage ... x:Name="Page">

    <ContentPage.BindingContext> 

         <local:ViewModel />

    </ContentPage.BindingContext>

    <buttons:SfChipGroup Type="Choice"

        ItemsSource="{Bindng BindingContext.ChipItems, Source={x:Reference Page}}"

        DisplayMemberPath="Name"

        SelectedItem="{Binding BindingContext.Item, Source={x:Reference Page}}" />

</ContentPage>

I want to put SfChipGroup in SfPopupLayout.

I write SfPopupLayout in ContentPage.Resources, And I want to use ViewModel set in ContentPage.BindingContext for ItemsSource of SfChipGroup.