title: WP Revolution slider not displaying properly 1 out of 5 times randomly
body: <p>I am having an issue with a website for our student-organized congress at <a href="http://ebspreneurship.de" rel="nofollow noreferrer">http://ebspreneurship.de</a> that randomly bugs roughly 1 ever 5 times - sometimes more, sometimes less.</p>
  
  <p>I have three revolution sliders - one is the above-the-fold content (full screen), just under it is the Elements section with another full width revolution slider(RS) and then on the bottom I have this map.</p>
  
  <p>From time to time randomly one of the 2 upper sliders (the last one never bugs) disappears and shows only the background image. I can't trace what's the problem, i spend a few days on that. I notice that if I start many browsers with the website and find one that's bugged, there is an error on Inspect:</p>
  
  <pre><code>Issue at YouTube Video Pause:
  (unknown) TypeError: d.getPlayerState is not a function
  </code></pre>
  
  <p>Still,  tried without youtube video and it bugs the same way with only BG image, so that error is for now irrelevant.</p>
  
  <p>I just don't get what's the problem and I tried disabling all plugins, i tried playing with caching methods or disabling it... Nothing changes it...</p>
  
  <p>Any help would be greatly appreciated!</p>