Icons on mobile, text separators and submenus

I use text separators as main menu items for opening submenus. They work great, even on mobile devices.
But if I use icon as mobile theme, they just don't open...
How can I access submenu items using the icon theme?

Hi
Please give me your url to check the problem
CEd

Thank you, Céd.
Check this test website .
In the topmenu, check the Il tuo account item.

in the module >> mobile options >> display type >> choose accordion instead of flat and tell me

It works, Céd.
Thank you.