Telegram Http.Get first message Status 202 (Ok) but following messages return Status=0 ?

I am using Http.Get towards Telegram and it has been working fine for many months.  

Just recently only the first message in an instance works, then any following messages from that instance do not work (response status=0). 

There has been a cTrader update to 5.2.5 which may be the culprit, not sure.  

Are others noticing the same behaviour using Telegram ? 

Would someone please have a solution for me ? 

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

[Robot(AccessRights = AccessRights.None, AddIndicators = true)]

private void SendTelegramMessage(string Message, string TelegramToken, string TelegramChatId)
{
    // Send message to Telegram 
    var result = Http.Get($"https://api.telegram.org/bot{TelegramToken}/sendMessage?chat_id={TelegramChatId}&text="+Message); 
    switch(result.StatusCode)
    {
         case 0:
             Print("Telegram: Status " + result.StatusCode + ": The bot sleeping, wake it up.");
             break;
         case 200:
             Print("Telegram: Status " + result.StatusCode + ": Message sent -> " + Message);
             break;
         case 400:
             Print("Telegram: Status " + result.StatusCode + ": The chat id (" + TelegramChatId + ") is incorrect.");
             break;
         case 401:
             Print("Telegram: Status " + result.StatusCode + ": The bot token (" + TelegramToken + ") is incorrect.");
             break;
        case 404:
            Print("Telegram: Status " + result.StatusCode + ": The bot token (" + TelegramToken + ") or chat id (" + TelegramChatId + ") is missing or incorrect.");
            break;
        default:
             Print("Telegram: " + result.StatusCode + ": Unknown error code.");
             break;
    }
}