title: Telegram bot and the method getUpdates
body: <p>I have a question about Telegram bot, I created a bot some weeks ago, it works fine but there is a strange behavior with the method getUpdates; indeed if I use the link:</p>
  
  <pre><code>https://api.telegram.org/bot&lt;token&gt;/getUpdates
  </code></pre>
  
  <p>now I can't see any message, but if I start a new bot this link works fine like the first day when I created the other bot.</p>
  
  <p>There is a particular interval of time after which this link stops working?
  There is a way to re-enable it?</p>
  
  <p>Thanks in advance</p>