when Klapmenu on the Android phone when you go to the + for the bottom, the menu immediately goes back to and does not respond.
That means you do not come to the subpages.
the problem only exists on mobile devices not on Windos PC
For the mobile menu, if you click/touch on the + icon it shows you the subpages and if you directly click/touch on the parent menu item and not the icon it redirects you to particular pages, so with the submenu items.
It works accordingly so please check and let us know.