Mobile menu… vanished

I was building a site using the free version of Catch Box. Everything seemed to be going great, I have it about finished, and went to check it on my phone to see how it looked there. While the menus show up fine on my laptop, I get no menu at all on my phone. (It was there before!) When I reduce the size of the window on my laptop to tablet or mobile size, it does the same thing. As soon as I pull it back to full size, the menus reappear. I've tried adding the third menu as well, it doesn't seem to make a difference. I'm not sure where to start looking to squash this bug. Help!