Dear Nicola,
I apologize for a slow reply, my hosting provider apparently had an accident on Christmas and all of my websites went offline for several days, including this forum.
Regarding your comment: I totally agree, that doesn’t look right! To fix this, please go to “Appearance -> Editor” admin menu and add the following line at the bottom of “Style.css” (should open be default):
#nav-primary { z-index: 1000 !important; }
and do not forget to hit “Update file”.
I will also include this fix in the next theme update.
Sincerely,
Andrew | Satori