DateTimePicker shows no calendar dropdown when using GTK on Ubuntu Linux

[theRainbird]

Expected Behavior

DataTimePicker should display a calendar when clicking the dropdown button when running on GTK on Ubuntu Linux 24.04 LTS.

Actual Behavior

Calendar flashes for a few milliseconds in the middle of the screen and then disappears.
In the debug console the following message is shown:

Gdk-Message: 22:32:08.871: Window 0x57123260c550 is a temporary window without parent, application will not be able to position it on screen.

Steps to Reproduce the Problem

1. Create a new Eto.Forms project that opens a Form using platform type Eto.Platforms.Gtk
2. Add a dynamic layout to the form
3. Add a DateTimePicker control to to dynamic layout
4. Set the dynamic layout as content of the from
5. Run the application

Code that Demonstrates the Problem

// Run this on a Ubuntu Linux 24.04 LTS machine

using Eto.Forms;

class Program
{
        [STAThread]
        public static void Main(string[] args)
        {
    	        new Application(Eto.Platforms.Gtk).Run(new MainForm());
        }
}

public class MainForm : Form
{
	public MainForm()
	{
                Padding = 3;
		Title = "Test Form";
		ClientSize = new Size(800, 600);

                var dynamicLayout = new DynamicLayout();
		dynamicLayout.Spacing = new Size(width: 5, height: 5);
		dynamicLayout.Padding = new Padding(10);
		dynamicLayout.BeginHorizontal();

                dynamicLayut.Add(new DateTimePicker());

		dynamicLayout.EndHorizontal();

                Content = dynamicLayout;
	}
}

Specifications

• Version: 9
• Platform(s): Gtk
• Operating System(s): Ubuntu 24.04 LTS