title: Height auto makes element disappear
body: <p>I have divs with below CSS, when the height is set to auto div disappears (div with class one).</p>
  
  <p>When height is set to some value in px then its visible (div with class two).</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.one,
  .two {
    display: block;
    width: 100px;
    background-color: rgb(67, 132, 245);
    position: fixed;
    border: 1px solid #000;
    bottom: 20px;
    background-image: url("https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png");
    background-size: 40px;
    background-position: center;
  }
  
  .one {
    height: auto;
    right: 20px;
  }
  
  .two {
    height: 100px;
    left: 20px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="one"&gt;
  &lt;/div&gt;
  
  &lt;div class="two"&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>