title: iOS VoiceOver not reading out nested <ul> element
body: <p>Reading this with VoiceOver enabled only reads the initial list elements, and does not navigate to the the nested list elements (underneath the second nested <code>ul</code> elements) when using the swipe left-to-right gesture. </p>
  
  <p>ANy ideas as to why this happens?</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
    &lt;head
    &lt;/head&gt;
    &lt;div&gt;
      &lt;ul role="menu"&gt;
        &lt;li role="menuitem"&gt;
          &lt;a href="#" aria-expanded="true"&gt;Expand&lt;/a&gt;
          &lt;ul role="menu"&gt;
            &lt;li role="menuitem"&gt;
              &lt;a href="#"  role="button"&gt;
                Link One
              &lt;/a&gt;
            &lt;/li&gt;
            &lt;li role="menuitem"&gt;
              &lt;a href="#" role="button"&gt;
                Link Two
              &lt;/a&gt;
            &lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
        &lt;li role="menuitem"&gt;
          &lt;a href="#"aria-expanded="true"&gt;Expand 2&lt;/a&gt;
          &lt;ul role="menu"&gt;
            &lt;li role="menuitem"&gt;
              &lt;a href="#" role="button"&gt;
                Link Three
              &lt;/a&gt;
            &lt;/li&gt;
            &lt;li role="menuitem"&gt;
              &lt;a href="#" role="button"&gt;
                Link Four
              &lt;/a&gt;
            &lt;/li&gt;
          &lt;/ul&gt;
        &lt;/li&gt;
      &lt;/ul&gt;
    &lt;/div&gt;
  &lt;/html&gt;
  </code></pre>