Multiple navbar issue

I have 2 navbars on my page. They works fine except one issue. When I open up one of the menus, the other navbar’s button stays on top of the newly opened menu. I have a little bit of front-end design experience and this appears to be a layer order issue? But I’m not sure… any ideas?

Hi Paul, do you have a public project link you could share, so that we on the forum can take a look and see if we can help?