title: Wordpress doesn't always load css
body: <p>My site is running with the last version of Wordpress and 15zine as a theme.</p>
  
  <p>Sometimes when I surf through the pages Wordpress doesn't load the CSS correctly so I can see only the simple HTML page without the right formatting.</p>
  
  <p>I've found out that these kinds of problems are usually caused by bad use of minimization and merging of cache plugins.</p>
  
  <p>I would suggest to first disable both and start enabling only the minification. If it correctly works, I would go ahead with merging. With HTTP/2 merging is less needed</p>