plugin re render

Hi,
I have a React.js Chat app, integrated into a cTrader plugin using a WebView.
Problem:
The app is repeatedly sending the same message to the chat for no obvious reason.

The app works perfectly in a browser.

code:

using System;
using cAlgo.API;
using cAlgo.API.Internals;

namespace cAlgo.Plugins
{
    [Plugin(AccessRights = AccessRights.None)]
    public class LocalhostViewer : Plugin
    {
        private WebView _webView;
        private string baseUrl = "http://localhost:3000";
        private string clientName = "plaseHolder";
        private string accountName; 
        private string fullUrl;

        protected override void OnStart()
        {
            accountName = Account.Number.ToString();
            fullUrl = $"{baseUrl}?client_token={clientName}&userId={accountName}";
            _webView = new WebView();
            _webView.Loaded += OnWebViewLoaded;
            var customFrame = ChartManager.AddCustomFrame("Localhost Viewer");
            customFrame.Child = _webView;
            customFrame.ChartContainer.Mode = ChartMode.Multi;
            customFrame.Attach();
        }
        private void OnWebViewLoaded(WebViewLoadedEventArgs args)
        {
            _webView.NavigateAsync(fullUrl);
        }
        protected override void OnStop()
        {
            Print("Plugin stopped.");
        }
    }
}

Thanks!
Moshe