Publisher in Windows Forms does not publish messages

[MrSzymonello]

Environment

NetMQ Version:    4.0.1.10
Operating System: Windows 10 Pro, 22H2, 19045.2364
.NET Version:     .NETFramework v4.8

Expected behaviour

The Pub/Sub model works when Publisher is a Windows Forms application.

Actual behaviour

Messages published from Windows Forms application do not reach the Subscriber.

Steps to reproduce the behaviour

Clone repository https://github.com/MrSzymonello/NetMqPubSubConsoleVsWinForms The repository contains 3 projects: Subscriber, Console Application Publisher and Windows Forms Publisher. Run Subscriber and Console Publisher. It works. Run Subscriber and Windows Forms Publisher. It does not work. Messages do not reach the Subscriber.

[MrSzymonello]

Here is the fix. The Form1.cs should like that

using System;
using System.Windows.Forms;
using NetMQ;
using NetMQ.Sockets;

namespace PublisherWindowsFormsApp
{
    public partial class Form1 : Form
    {
        private readonly PublisherSocket publisher = new PublisherSocket();
        public Form1()
        {
            publisher.Bind("tcp://127.0.0.1:8888");
            InitializeComponent();
        }

        private void buttonPublish_Click(object sender, EventArgs e)
        {
            publisher
                    .SendMoreFrame("COMMAND")
                    .SendFrame(textBoxCommand.Text);
        }
    }
}

not like that

using System;
using System.Windows.Forms;
using NetMQ;
using NetMQ.Sockets;

namespace PublisherWindowsFormsApp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void buttonPublish_Click(object sender, EventArgs e)
        {
            using (var publisher = new PublisherSocket())
            {
                publisher.Bind("tcp://127.0.0.1:8888");

                publisher
                    .SendMoreFrame("COMMAND")
                    .SendFrame(textBoxCommand.Text);
            }
        }
    }
}