Hummingbird is causing the header to flicker on page load using Divi

I have noticed on a few of my sites that use Divi that when the page loads there is a flicker in the header. The top/secondary menu bar opens with the default Divi blue background and then flickers to the right color after a split second.

I have disabled all other plugins and it only seems to happen when hummingbird is active.

WordPress and all plugins are up to date.