Page Builder ‘Full Width’ rows cover collapsed mobile menu Obox Layers theme

Hi!

I’m using SiteOrigin Page Builer with a child theme of Layers by Obox on this website: http://kaluste-kippari.fi/

On the desktop width everything seems fine.

On mobile view, i.e. when the browser window is narrow enough that the mobile menu button appears, when clicking the menu button, the menu collapses but stays hidden behind SiteOrigin rows that are set to ‘Full Width’ or ‘Full Width Stretched’.

I’ve seen many threads offer z-index as a solution. This works for me on the normal navigation menu (I’ve set it to 200), but I can’t figure out how to make it work for the mobile menu.

Any help much appreciated!

Cheers,
Jos