PopTip.Instance NullRef

[Gamer-XP]

Describe the bug

I have an issue with PopTip. I got one in DataTemplate that used used in ComboBox. If I change values to a type that used different DataTemplate - I get an nullRef error for changing Instance. Trying to show just null value will give same result.

It happens in this method:

    private static void OnInstanceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        if (d is not FrameworkElement target) return;
        var element = (AdornerElement) e.NewValue;
        // Element is null here
        element.OnInstanceChanged(target);
    }

This is the call stack:
https://gyazo.com/ad985bd2b4128aa176fe1c8dad39d499

Steps to reproduce the bug

The Template I used. It shows Image from the ViewModel. Doesn't really do anything else.

<DataTemplate DataType="{x:Type resources:SpriteViewModel}">
        <presets:CollectionItemDefault>

            <presets:CollectionItemDefault.IconContent>
                <Image Source="{Binding MainImage}"/>
            </presets:CollectionItemDefault.IconContent>

            <TextBlock Text="{Binding Name}" />

            <hc:Poptip.Instance>
                <hc:Poptip DataContext="{Binding Target.DataContext, RelativeSource={RelativeSource Self}}" IsHitTestVisible="False" PlacementType="Left" HitMode="Hover" Delay="100">
                    <hc:Poptip.Content>
                        <GroupBox Width="300" Height="350">
                            <GroupBox.Header>
                                <TextBlock Text="{Binding Name}"/>
                            </GroupBox.Header>

                            <Image Source="{Binding MainImage}" />

                        </GroupBox>
                    </hc:Poptip.Content>
                </hc:Poptip>
            </hc:Poptip.Instance>

        </presets:CollectionItemDefault>
    </DataTemplate>

Expected behavior

No response

Screenshots

No response

NuGet package version

HandyControl 3.5.1

IDE

Visual Studio 2022

Framework type

.Net 9.0

Windows version

May 2021 Update (19043)

Additional context

No response