Mobile Menu - cloning title menu to submenu not working

Hi there,

Not sure if I’m posting in the correct place. I am having an issue on one of my sites with the mobile menu. It is not creating a clone of the top level nav on the submenu when I enable this. It works on every other website I have used it on… which leads me to believe that we hit something that broke this functionality when we were doing customization to this site in particular. Can someone help, please??