Custom mobile menu blocking buttons underneath

I am quite new to Webflow and decided to build a custom navbar for my website to get the hang of things. The hamburger menu on mobile breakpoints opens from the side with some animations, which I got working as intended. But once the menu is opened and closed again, the buttons/links on the main body do not work anymore.
I checked z-index and couldn’t find a problem. Is there something up with the interaction of the menu? Thanks in advance for any hints!