cTrader 5.1.11 RemoveChild is not working/GC collected (disapears from chart)

Probably source-code-comments will say more for developer then I will try rephrase same Bug in “managers language”
Attaching source-code and recorded-video*.gif to show where specifically RemoveChild is not working... and it costed a lot gray matter to simplify the problem and show it as an examples :)

Thanks for fixing this issue in upcoming updated!

//Example1, RemoveChild is NOT working (disapears from chart)
//BUG: because we still hold same ctrlMenu.canvasMain reference and cAlgoGC is not able properly remove/GC it (maybe still reference ctrlMenu.canvasMain is in remove state forever until removed/GC ctrlMenu object)

/*Example2, RemoveChild IS working 
* as we initiate new ctrlMenu object with its new controls
*/

/*Example3, RemoveChild IS working
* This example is just to prove/show OnTimerThread is GC after execution and on next OnTimerThread AddChild works just fine (button is being draw on chart)
*/

recorded-video*.gif is here (cannot upload with this text editor): https://1drv.ms/i/c/19d5225e11df9056/EcIT7lPdeHNLpJTT9sNk3OMBlga76PMt7hJCEv-cH7HH_g?e=UYmc3d

using System;
using System.Diagnostics;
using cAlgo.API;

namespace cAlgo.Robots
{
    [Robot(AccessRights = AccessRights.FullAccess)]
    public class AlgoTests : Robot
    {
        Menu ctrlMenu;
        public Canvas layer0;

        protected override void OnStart()
        {
#if DEBUG
            Debugger.Launch();
#endif
            ctrlMenu = new Menu();

            layer0 = new Canvas();
            Chart.AddControl(layer0);

            Timer.Start(TimeSpan.FromSeconds(1));
        }

        int timerNo = 0;
        DateTime timerUpdated = DateTime.MinValue;
        protected override void OnTimer()
        {
            //Example1, RemoveChild is NOT working (disapears from chart)
            //BUG: because we still hold same ctrlMenu.canvasMain reference and cAlgoGC is not able properly remove/GC it (maybe still reference ctrlMenu.canvasMain is in remove state forever until removed/GC ctrlMenu object)
            if (DateTime.Now > timerUpdated)
            {
                layer0.RemoveChild(ctrlMenu.canvasMain);
                layer0.AddChild(ctrlMenu.canvasMain);

                Print($"{DateTime.Now: hh:mm:ss.fff} Example1 OnTimer");
                timerUpdated = DateTime.Now.AddSeconds(5);
            }

            /*Example2, RemoveChild IS working 
             * as we initiate new ctrlMenu object with its new controls
             */
            /*if (DateTime.Now > timerUpdated)
            {
                ctrlMenu = new Menu();

                layer0.RemoveChild(ctrlMenu.canvasMain);
                layer0.AddChild(ctrlMenu.canvasMain);

                Print($"{DateTime.Now: hh:mm:ss.fff} Example2 OnTimer");
                timerUpdated = DateTime.Now.AddSeconds(2);
            }*/

            /*Example3, RemoveChild IS working
             * This example is just to prove/show OnTimerThread is GC after execution and on next OnTimerThread AddChild works just fine (button is being draw on chart)
            */
            /*if (DateTime.Now > timerUpdated)
            {
                timerNo++;

                if (timerNo % 2 == 0)
                {
                    layer0.RemoveChild(ctrlMenu.canvasMain);
                    Print($"{DateTime.Now: hh:mm:ss.fff} Example3 removed");
                }
                else
                {
                    layer0.AddChild(ctrlMenu.canvasMain);
                    Print($"{DateTime.Now: hh:mm:ss.fff} Example3 added");

                    timerUpdated = DateTime.Now.AddSeconds(2);
                }
            }*/
        }

        protected override void OnTick()
        {
        }
    }

    public class Menu
    {
        public Canvas canvasMain = new();
        Button btnTest = new() { Text = "btnTest", FontSize = 20 };

        public Menu()
        {
            canvasMain.AddChild(btnTest);
        }
    }
}