Sub menu disappears on touch devices (iOS)

Can you help me understand why my submenus are disappearing? Originally I had a menu structure like this

About Us (Page)

  • Mission & Vision (Page)

  • Staff Profiles (Page)

But using that structure, on an iPad, if someone tapped about us, the submenu would appear and disappear before they could select anything. We reorganized the menu items like this now

About (Folder, not a page)

  • About us (Page)

  • Mission & Vision (Page)

  • Staff Profiles (Page)

With folders at the top level, the problem on iPad is solved BUT I don’t like this layout as much (not a big deal) and we can no longer use breadcrumbs in the navigation because they include the non-clickable folder name (bigger deal)

I tried several other things after reading and searching quite a bit, like changing the size and layout of the menu, deleting other elements from the header to make sure other elements weren’t interfering, deleting the menu and putting in a new one, all that sort of thing.

I would appreciate any thoughts or better ideas! Thanks so much.