mobile menu issue on iphone

Hi there,

We like Enfold theme very much, especially the page builder, but now this bug drives us crazy :)
So, the problem is that the hamburger icon does not show up on iPhone. It displays correctly on Android and Windows Phone, but on iPhone, no menu. I think this might be a Javascript problem, because after I saw the issue I inserted this CSS to force it to show up, but no success:

.responsive.html_mobile_menu_tablet.html_logo_right #header_main  #advanced_menu_toggle {
        position: absolute;
        top: 10px;
        right: 10px;
        width: 44px;
        height: 44px;
        display: block !important;
}

I put the link to the website and an image to the private content. Thanks for you help!

Cheers,
eworks.hu team