Bug? Mobile menu not working…

Hi,

Love your theme. But just installed the new version and mobile menu doesn’t seems to be working.

See how your demo looks on mobile view: https://mobiletest.me/iphone_5_emulator/?u=https://wp-themes.com/vantage/

Although the demo on your site looks ok: https://mobiletest.me/iphone_5_emulator/?u=https://demo.siteorigin.com/vantage/plugin-intergration/

Is this is a bug?

Thanks