Endless loop in IUpdateHandler, HandleErrorAsync

[depler]

Here is code sample of IUpdateHandler implementation:

public class TelegramHandler : IUpdateHandler
    {
        public async Task HandleUpdateAsync(ITelegramBotClient botClient, Update update, CancellationToken cancellationToken)
        {
            try
            {
                //disable internet connection at this point

                if (update.Type == UpdateType.Message)
                    await botClient.SendTextMessageAsync(update.Message.Chat.Id, "test"); 
            }
            catch { }
        }

        public Task HandleErrorAsync(ITelegramBotClient botClient, Exception exception, CancellationToken cancellationToken)
        {
            //this will be called in endless loop, while internet is off
            Console.WriteLine("error");
            return Task.CompletedTask;
        }
    }

Now, do the following:

1. Put breakpoint at line if (update.Type == UpdateType.Message)
2. Send message to the bot to hit breakpoint
3. Disable your internet connection
4. Release breakpoint
5. Watch at console output and CPU load 😊

This happens because of call _botClient.MakeRequestAsync inside loop:

Which is going to exception handler:

Probably some workaround can be done by catching HttpRequestException and invoking Task.Delay(1000)