title: Telegram bot send message problems after some days
body: <p>I have some problem with my telegram message, it's overview of problem:</p>
  
  <p>You will pass /start command my bot started sending messages, but after some days it will stop sending messages, if client pass some message client bot again starts sending messages, what can I do for define after how much days it will stop, does it documentation anywhere? maybe some configurations are wrong? who have such kind of situation pls, reply?</p>
  
  <p>also I always this api call for sending messages:</p>
  
  <pre><code>https://api.telegram.org/bot{TELEGRAM_BOT}/sendMessage?disable_web_page_preview=false&amp;chat_id=$chat_id&amp;text={TEXT}
  </code></pre>