Rose/Olga, it worked! Thank you. I took your suggestion and swizzled it around. Don’t even need the jQuery I initially thought I did.
.nav-sublist-dropdown {
transition-duration: .5s;
animation: none;
display: block;
opacity: 1 !important;
visibility: hidden;
overflow-y: hidden;
max-height: 0;
transition-property: all;
transition-timing-function: cubic-bezier(0, 1, 0.5, 1);
}
.menu-item-has-children:hover .nav-sublist-dropdown, li:hover .nav-sublist-dropdown {
animation: none;
opacity: 1 !important;
visibility: visible;
max-height: 500px; /* approximate max height */
}