Multiple SubMenus on Mobile

I am using Felicity Theme and I am seeing 3 submenus that cut off my logo and doesn’t scroll all the way through the list.

I can’t send you the site because it is currently not live.

Here is a snapshot of the 3 menus.
http://cl.ly/023x2V1y0u2M

Here is a snapshot of one of the menus opened. You cannot scroll through the menu. Scrolling only affects the main page in the background while menu is open.
http://cl.ly/11303H2p3u3D

Please help fix the issue. Thanks,
Crystal

https://wordpress.org/plugins/megamenu/