title: Z-index issue on iOS Safari & Chrome
body: <p>I'm having an issue with a responsive dropdown menu, based on wordpress Underscores theme.</p>
  
  <p>It looks okay on desktop but not on iOS Safari including iPad and iPhone.</p>
  
  <p><a href="https://i.stack.imgur.com/2vx5P.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2vx5P.jpg" alt="enter image description here"></a></p>
  
  <p>I've tried to add z-index to other divs as well but it doesn't work. Please help me.
  Thanks.</p>