Problem with the display of the button in the indicator area

Hello friends
I'm having trouble displaying a button in the indicator area and it doesn't work properly.
If so, no error is seen in the code and if I use it to display in the chart, it will be displayed correctly.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using cAlgo.API;
using cAlgo.API.Collections;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;

namespace cAlgo
{
    [Indicator(AccessRights = AccessRights.None,IsOverlay =false)]
    public class NewIndicator8 : Indicator
    {
        [Parameter(DefaultValue = "Hello world!")]
        public string Message { get; set; }

        [Output("Main")]
        public IndicatorDataSeries Result { get; set; }

        protected override void Initialize()
        {
            var stackPanel = new StackPanel
            {
                HorizontalAlignment = HorizontalAlignment.Center,
                VerticalAlignment = VerticalAlignment.Center,
                BackgroundColor = Color.Gold,
                Opacity = 0.7
            };
            var button = new Button
            {
                Text = "Button #",
                Margin = 2,
                HorizontalAlignment = HorizontalAlignment.Center,
                VerticalAlignment = VerticalAlignment.Center
            };
            button.Click += Button_Click;
            stackPanel.AddChild(button);
            IndicatorArea.AddControl(stackPanel);
        }
        private void Button_Click(ButtonClickEventArgs obj)
        {
            Print("Click");
        }

        public override void Calculate(int index)
        {
            // Calculate value at specified index
            // Result[index] = 
        }
    }
}