Send sticky header to back

Hi there,

Is it possible to send the sticky header to back? The Z-index doesn’t seem to work.

I have a social navbar above the sticky header and a woo-commerce cart with the dropdown. When you click the cart, the cart appears but the sticky header remains above and blocks the items and some content in the cart, which obviously doesn’t work.

If you need to access the site, I can give you login, just provide an email!

Thanks!