WPF. Class with finalizer. Memory leak

Continuing the topic
I received fundamentally new data, so I decided to create a separate topic.

Created a minimal reproducing application.

Reproducing conditions:
1) Visual Studio 2017
2) WPF application
3) Launch the application under the debugger
4) WPF window code

using System.Windows;

namespace ReproduceFinalizerMemoryLeak
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            do
            {
                Item item = new Item();
            } while (true);

            InitializeComponent();
        }
    }

    public class Item
    {
        private byte[] _bytes;

        public Item()
        {
            _bytes = new byte[10000];
        }

        ~Item()
        {

        }
    }
}

What comes up:
This application craches with OutOfMemoryException. Item class finalizer is not called.

In my real WPF application, a memory leak occurs without debugging and under milder conditions, but the manifestations are the same: finalizers are not called, memory leaks.

It seems that the WPF main thread blocks the thread in which finalizers are called
under certain conditions.