Describe the bug

Here is a combobox

        <ComboBox ItemsSource="{CompiledBinding ClassList}">
            <ComboBox.ItemTemplate>
                <DataTemplate DataType="controlDemo:MyControl">
                    <TextBlock Text="{CompiledBinding MyName}"></TextBlock>
                </DataTemplate>
            </ComboBox.ItemTemplate>
        </ComboBox>

public class ViewModel:ReactiveUI.ReactiveObject
{
    public AvaloniaList<MyControl> ClassList { get; } = new(){new MyControl(){MyName = "MyName One"},new MyControl(){MyName = "MyName Two"} };
}

public class MyControl:Control
{
    public string MyName
    {
        get;
        init;
    }
}

The combobox shows the ClassList. The MyControl s are shown correctly in popup, however, the selected one in SelectionBox turns out to be "Avalonia.Controls.Shape.Rectangle", although there's no "Avalonia.Controls.Shape.Rectangle" in all the code.

This issue may happen only when the model to be shown is a child class of Control.

To Reproduce

As i have written in Describe the Bug

Expected behavior

Show the content according to the DataTemplate, not "Avalonia.Controls.Shape.Rectangle"

Avalonia version

The latest version(11.3.11)

OS

Windows

Additional context

No response