Experiencing problems with the Megamenu when using multiple menu's with a Template dropdown that has a module inside. The Custom module contains an image.
Since the module contains a full width page. This creates a problem with the location of the sp-dropdown-inner.
By changing right:0; to 'auto' and adding max-width this gets solved.
body.ltr .sp-megamenu-parent .sp-dropdown.sp-dropdown-main.sp-menu-full {
left: auto;
right: auto;
max-width:300px;