Quick response to support

Pay attention not to mix http over https. Make a redirecction http to https to avoid fail to load style css and javascript wrong, so you′re site looks bad.

Another important thing, it′s desactivate this: “New Post: Clear all cache files when a post or page is published” Better do it manually whenever you need.

Better note in PageSpeed Insights, but It could be better.

Thanks for the support emailing.