I'm working with a JointsWP Wordpress theme, so not directly with Foundation.
I have a menu that uses 'nav-title-bar'. It has a top-level item ('Genres') that contains a list of subitems ('Action', 'Adventure', etc.). On the desktop at full size, it works perfectly. When I narrow the browser window <= 640px, the menu changes to a mobile version: it also works correctly. But on my phone (width 640px), the subitems are listed horizontally, as in the image below.
Any idea why this is happening, or more importantly, how to fix it?
Thank you very much for any help!