Hi Sandy,
Yes you are right, but it will be updated in the next version of the theme for sure. but for now you can use the following css.
.site-navigation .current-menu-item > a, .site-navigation .current-menu-ancestor > a.site-navigation .current-menu-item > a, .site-navigation .current-menu-ancestor > a {
color:#f00!important;
}
Thanks.