Issue with Underline on Layout 405 Tab Links in Webflow Project

I am currently working on my course project and using the Layout 405 component (https://www.relume.io/components/layout-405). When I copy & paste the component into my Webflow project, all three layout405_tab-links have an underline beneath them. There should only be one at a time. I've run out of ideas as to what the issue is. Anyone got any indeas?