Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.
The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.
We’ve checked your website again and cannot find anything that is wrong.
Unfortunately the “Prioritize visible content” point covers all aspects of your site. It includes: images optimization, gziping all your content with a web server, compress all JS and CSS and make them load only after full loading DOM model.
Generally theme moves JS at the bottom, but CSS cannot be moved. From the PS report you still have some things to do; please check our previous post with instructions. It might help you with the “Prioritize visible content” problem.
P.S. I reckon not blind rely to the hidden PageSpeed algorithm which frequently changing. Something in it is useful, but something no.