Hello @bcoplin,
Thanks for writing to us.
I checked your site page URL it seems that there is a JS code working which is decreasing the z-index of the section, I would suggest you please remove the JS code, or for a quick fix, you can override the style by custom CSS code.
header.x-section.sticky{z-index: 99 !important;}
The purpose of providing custom CSS is to show you how to add CSS code to your site. Writing custom CSS is outside the scope of our theme support. If you need more customization, you need to learn CSS and learn how to use the browser’s element inspector.In case you have no idea about coding you can subscribe to One where customization questions are answered.
Hope it helps.
Thanks