Headers returning x-cdn-cache-status MISS indicate the request was served by the origin 20i server. This means that the response was not found in the cache and so was fetched from the origin server, resulting in a longer TTFB and a longer total load time. On pages you want to be cached you'd expect to see x-cdn-cache-status HIT. A cache 'MISS' status is usually caused under three main conditions: Browser cookies being set, Conflicting caching plugins, Preventative .htaccess file directives.