title: Why does the TTL index expire sooner than it has to?
body: <p>Whenever I set an expiration date like this:</p>
  <pre><code>expireAt: {
    type: Date,
    default: Date.now(),
    index: { expires: '3d' },
  },
  </code></pre>
  <p>It expires much sooner than expected, usually within 2 or 3 minutes after creation.</p>
  <p>When the document is created, it looks similar to this:</p>
  <p><a href="https://i.stack.imgur.com/ipsAP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ipsAP.png" alt="enter image description here" /></a></p>
  <p>Any help would be appreciated. Thanks</p>