Sub-menu item hidden

Hi,
after updating the theme to version 1.2.4 and WP to 5.0.3, a strange thing happens with the sub-menus.
If the page has full-width content, some menu items remain hidden.
If the page has the sidebar, the menu items are all visible.
I leave the links to understand the problem.

Visible -> https://www.reikiespirito.net/corso-allineamento-armonico/
Hidden -> https://www.reikiespirito.net/7-specchi-esseni/

Thanks a lot