Hi @kiksnklips,
We are really sorry for this problem.
We have launched a new update for Gwangi that solve this particular issue, you can update your theme.
If you want to fix this particular problem right now you can put this little CSS code snippet in your Customizer (Additionnal CSS panel) :
.widget_grimlock_nav_menu_section .region--8-4-cols-grid .menu .menu-item .menu-image-hover-wrapper {
padding: 0;
position: relative;
display: block;
height: 100%;
}
Feel free to give us any updates about this problem!
Hoping that everything will be fine.
Regards,