Menu items with no link miss of CSS

If a menu item without link (route:<nolink>) is added to the toolbar menu, is not rendered correctly:

The quick fix is to add this CSS code:

.toolbar-menu  .menu-item > span {
      padding: 1em 1.3333em;
      display: block;
      color: #434343;
      cursor: pointer;
}

but, obviously, the better is to fix the module's CSS.