With an increased importance on the web, speed matters more than ever and Listify's theme has a CLS issue that has to do with the HTML structuring. Specifically, look at the first DIV in your theme's header . This happens on your demo or even a fairly "naked" version of the theme. I tried closing the DIV tag and re-opening it elsewhere, just to see if 2 or 3 smaller would impact it, but it did not.