title: intl-tel-input dropdown not working on mobile browser
body: <p>I am using intl-tel-input <a href="https://github.com/jackocnr/intl-tel-input" rel="nofollow noreferrer">library</a> for international telephone dropdown selection.</p>
  
  <p><a href="https://i.stack.imgur.com/vPfpd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vPfpd.png" alt="enter image description here"></a></p>
  
  <p>When opening the app on web browser, country flags are coming as expected with proper styling, but it comes like above screenshot in mobile browser. I have added the flag css like</p>
  
  <p><code>background-image: url("../images/flags@2x.png");</code></p>
  
  <p>Library's live sample is <a href="https://intl-tel-input.com/" rel="nofollow noreferrer">here</a>. Any clue?</p>
  
  <p>--------------------- Edit ---------------------</p>
  
  <p>I am using International Telephone Input v9.0.5.</p>