Comment to Profile Submenu - Vertical Height
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you need to add a height value to one of the submenus in your css as in height: 30px; or whichever you prefer
<ul id="bx-menu-main-submenu" class="bx-menu-main-submenu bx-menu-more-auto bx-menu-object-bx_persons_view_submenu bx-clearfix" style="overflow: visible;">
or you can test it inline in your browser by adding to the style=" tag for example style="overflow: visible; height: 30px;">