CSS loading issue

From looking at your page source it appears as if you have some code that strips any query arg from a URL in your headers.

Category Colors stylesheet appears as a query arg because it’s pulled from the database.

Do you have some plugin or code that “speeds up” you site or “improves the Pingdom or GTmetrix scores?

Thanks a lot! I’ve forgot this code on functions.php that remove query strings from URl to allow servers to cache query strings.

function _remove_script_version( $src ){
  $parts = explode( '?', $src );
  return $parts[0];
}
add_filter( 'script_loader_src', '_remove_script_version', 15, 1 );
add_filter( 'style_loader_src', '_remove_script_version', 15, 1 );

It works!