Hi
I have replicated this issue after disabling all plugins and removing all custom CSS before reporting this issue:
The menu buttons displays correctly below 768px.
The horizontal menu displays correctly above 1025px.
Between 768 & 1024px the menu displays as a list without CSS.
URL: https://www.tridentglass.com.au/
Behavior replicated on IE, chrome and edge
Also can the mobile menu button be centered below the logo?
Other than this issue this is the first site I have designed using an ACMETHEME and found the theme to be well designed and highly functional. It integrates perfectly with SiteOrigin page builder.
Ben