Mega Menu fail – faulty in and out

Hey folks,

I’ve built a swanky new mega menu, but it’s super glitchy, the hover states aren’t triggering and on close, the nav isn’t coming back to its original state:…

Hopefully, a simple fix as it was working fine before I adjusted the z-index of the nav bar.

Cheers in advance.

Here is my public share link: LINK
(how to access public share link)