Inconsistent MouseEnter and MouseLeave behavior in GTK#

[bbb0x]

Expected Behavior

Background should be #dfdfdf as long mouse is over the Stacklayout, like it works with Windows and Mac.

Actual Behavior

On GTK# the background flickers

Steps to Reproduce the Problem

1. Hover the mouse over the Stacklayout wrapping the Content Editor button

Code that Demonstrates the Problem

     void InitializeComponent()
        {
            Title = "GM Kickout";
            MinimumSize = new Size(200, 200);
            Size = new Size(600, 300);
            var root  = new DynamicLayout();
            root.BackgroundColor = Colors.White;

            var header = new DynamicLayout();
            header.Height = 70;
            header.BackgroundColor = Color.FromRgb(0x008080);

            root.Add(header);

            var content = new DynamicLayout();
            content.Padding = new Padding(0, 20, 0, 0);
           

            var layout1 = MainLayout.CreateMainContentItem("Content Editor", "Edit the Content files of the project.", null);
            content.Add(layout1);
            root.Add(content);
	    Content = root;

            Focus();
	}
			
			
			
			
public static class MainLayout
{
        public static DynamicLayout CreateMainContentItem(string title, string description, Action click)
        {
            DynamicLayout layout = new DynamicLayout();
            
            StackLayout stackLayout = new StackLayout();
            stackLayout.Orientation = Orientation.Vertical;
            stackLayout.Padding = new Padding(0, 10);
            stackLayout.HorizontalContentAlignment = HorizontalAlignment.Center;
            stackLayout.MouseEnter += ((e, o) =>
            {
                stackLayout.BackgroundColor = Color.FromRgb(0xdfdfdf);
            });
            stackLayout.MouseDown += ((e, o) =>
            {
                stackLayout.BackgroundColor = Color.FromRgb(0x008080);
                if(click != null)
                click();
            });
            stackLayout.MouseLeave += ((e, o) =>
            {
                stackLayout.BackgroundColor = SystemColors.ControlBackground;
            });

            Label titleLbl = new Label();
            titleLbl.TextColor = Color.FromRgb(0xf88379);
            titleLbl.Font = new Font(SystemFont.Label, 20f);
            titleLbl.Text = title;

            Label descriptionLbl = new Label();
            descriptionLbl.Font = new Font(SystemFont.Label);
            descriptionLbl.Text = description;

            stackLayout.Items.Add(titleLbl);
            stackLayout.Items.Add(descriptionLbl);

            StackLayout dummy = new StackLayout();
            layout.Add(stackLayout);
            layout.Add(dummy);

            return layout;
        }

}

Specifications

• Version: 2.59
• Platform(s): Windows example using WPF, Linux example using GTK#
• Operating System(s): Windows 10 | Ubuntu 20.04.2 LTS as a VirtualBox guest under Windows 10.

Also tested on macOS Mojave with Mac inside VirtualBox which results in the same behavior as on Windows.