Hi Viktor,

you need to ensure that whatever CSS / js takes care of the menu formatting is loaded as soon as possible or preloaded. It’s likely that it’s because Autoptimize has combined the menu js/css into one single CSS / js file with all others and loads later. Excluding the menu CSS/js could solve the issue. (Just generate the critical CSS for the menu and inline it into the header).

When I mention JS, I’m just guessing – not sure if there’s a js script handling the menu or just CSS. There’s a js-superfish class added to the menu, so perhaps you could start with that.

I’d turn off Autoptimize, check which scripts / CSS is loaded that format the menu, inline / preload them, then turn autoptimize on and see if that helps.

I’d also check the theme options to see if there’s a different way to display / load the menu perhaps? Turn off some fancy features and it might load closed straight away.

Let me know if you manage to solve this – it’ll also help other Genesis theme users.

Lukas