I have set all my menus up with a dropdown menu, tweaked them for media queries, in Design mode everything is set perfectly. In preview and publish mode it's broken as thh open menu has moved. This occurs on all open 'hamburger' menus. I have tried quitting, changing things around etc etc.
see screen grabs:
And here's a link to have a look at my set up.
Any ideas anyone?
Or has the script got confused and needs resetting in some way…?