Cloudflare APO breaks my site unless I purge the cache

I am using the APO cahching with my wordpress site. www.technav.co. If I do not purge the cache every day or so, the site will load up a messed up version of the site. No header, stripped down them mostly showing text on the page. Once I clear the cache it resolves. I disabled all other caching on the site, which was just the built-in wordpress one. Any ideas?