upfront-output-module

I am using UBERMenu with the Spirit theme.

I have the header as sticky and when I hover over my UBERmenu in the header, the submenu goes behind the slider. When I scroll just a little bit so that the body goes under the header, the submenu displays correctly. I have found this snipet of code:

.upfront-output-module {
position: relative;
z-index: 1;
pointer-events: auto;
}

When manipulating in Firefox and Explorer, and remove the z-index:1; I am able to get the submenu to display correctly. However in Chrome, it does not.

Any suggestions?