When I switch mega menu to full width (in customizer) it becomes inaccessible because there is a gap between menu item and submenu.
Steps to reproduce:
Create mega menu item
Go to customizer -> menu options -> full width
Try to hover menu item and then move mouse to the opened submenu
I have tried to set negative margin for submenu but it affects also normal submenus which work fine.
You can see more details in the video in private area.