title: How to debug a bug occurs only in the real iPhone?
body: <p>My website works well on desktop version and on DevTools mobile phone simulator.</p>
  <p>However, when running in the real iPhone 11, when clicking an element, it seems the click event does not fire. I need to click again and then the website will response.</p>
  <p>This only occurs on the real iPhone, not on the DevTools mobile phone simulator. How can I debug the codes to solve the issue?</p>
  <p>Thanks</p>