Interazione trigger all'interno DataTemplate non funziona con XamlReader

Sto cercando di analizzare con XamlReader.Load() un DataTemplate (per un WPF datagrid) creato dinamicamente in codice dietro :

DataTemplate dataTemplate;

StringReader template = new StringReader($@"
<DataTemplate
    xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
    xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml""
    xmlns:local=""clr-namespace:MyApp;assembly=MyApp"">
<DataTemplate.Resources>
    <local:ArrayMultiValueConverter x:Key=""arrayMultiValueConverter""/>
</DataTemplate.Resources>
    <StackPanel Orientation=""Vertical"">
        <Expander VerticalAlignment=""Center"" xmlns:i=""http://schemas.microsoft.com/xaml/behaviors"">
        <i:Interaction.Triggers>
            <i:EventTrigger EventName=""IsExpanded"">
                <i:InvokeCommandAction Command=""{{Binding DataContext.TextFilterColumn}}""/>
            </i:EventTrigger>
        </i:Interaction.Triggers>
            <Expander.Header>
                <TextBlock x:Name=""{dtColumnName}"" VerticalAlignment=""Center"" Text=""{{TemplateBinding Content}}"" Margin=""5,5,5,0"" FontWeight=""SemiBold""/>
            </Expander.Header>
            <StackPanel Orientation=""Horizontal"">
                <TextBox x:Name=""{"TbxFilter" + dtColumnName}"" Width=""100"" Margin=""5""/>
                <TextBlock Margin=""0,0,5,0"" VerticalAlignment=""Center"" FontFamily=""Segoe MDL2 Assets"">
                    <Hyperlink TextDecorations=""{{x:Null}}"" Command=""{{Binding DataContext.FilterColumnName, RelativeSource={{RelativeSource FindAncestor, AncestorType={{x:Type Window}}}}}}"">
                        <Hyperlink.CommandParameter>
                            <MultiBinding Converter=""{{StaticResource arrayMultiValueConverter}}"">
                                <Binding Path=""Text"" ElementName=""{dtColumnName}"" />
                                <Binding Path=""Text"" ElementName=""{"TbxFilter" + dtColumnName}"" />
                            </MultiBinding>
                        </Hyperlink.CommandParameter>   
                        &#xE721;
                    </Hyperlink>
                </TextBlock>
                <TextBlock Margin=""0,0,5,0"" VerticalAlignment=""Center"" FontFamily=""Segoe MDL2 Assets"">
                    <Hyperlink TextDecorations=""{{x:Null}}"" Command=""{{Binding DataContext.FilterColumnName, RelativeSource={{RelativeSource FindAncestor, AncestorType={{x:Type Window}}}}}}"">
                        <Hyperlink.CommandParameter>
                            <MultiBinding Converter=""{{StaticResource arrayMultiValueConverter}}"">
                                <Binding Path=""Text"" ElementName=""{dtColumnName}""/>
                                <Binding Path=""Text"" RelativeSource=""{{RelativeSource FindAncestor, AncestorType={{x:Type TextBlock}}}}""/>
                            </MultiBinding>
                        </Hyperlink.CommandParameter>
                        &#xe75c;
                    </Hyperlink>
                </TextBlock>
            </StackPanel>
        </Expander>
    </StackPanel>
</DataTemplate>
");

XmlReader xmlReader = XmlReader.Create(template);
dataTemplate = XamlReader.Load(xmlReader) as DataTemplate;

textColumn.HeaderTemplate = dataTemplate;

Tutto è in funzione, quando togliere questa parte di codice :

<i:Interaction.Triggers>
    <i:EventTrigger EventName=""IsExpanded"">
        <i:InvokeCommandAction Command=""{{Binding DataContext.TextFilterColumn}}""/>
    </i:EventTrigger>
</i:Interaction.Triggers>

Ma quando aggiungo, c'è un Exception Thrown :

Sistema.Windows.Markup.XamlParseException: "Impossibile impostare un membro sconosciuto '{http://schemas.microsoft.com/xaml/behaviors}Interazione.Trigger'.' Il numero di riga '11' e la posizione della linea di '10'.'

Io uso "XAML Comportamenti" a seguito di questo articolo (ma lo stesso è accaduto con Interactivity) :

https://devblogs.microsoft.com/dotnet/open-sourcing-xaml-behaviors-for-wpf/

Sembra essere un problema con il XamlReader.Load(xmlReader).

Se qualcuno conosce una soluzione, sarò grato.

Configurazione :

• Quadro 4.8 (provato con 4.7.2)
• Microsoft.Xaml.I comportamenti.Wpf 1.1.39

Grazie.