Drag and drop menu items issue (JQuery)

I came to this same issue reported at
https://kriesi.at/support/topic/cannot-movedrag-menu-items-also-question-about-ipadtablet-view/
https://kriesi.at/support/topic/change-order-menu-items/
https://kriesi.at/support/topic/i-cannot-drag-and-drop-menu-items-to-change-their-order/

Moreover, I noticed other wierd behaviors in admin sections, i.e. Media Library grid mode.

I could find an extra JQuery load right after
<script type='text/javascript' src='(...)/wp-admin/load-scripts.php?c=1&load%5B%5D=utils,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-draggable,jquery-ui-droppable,wp-ajax-respons&load%5B%5D=e,jquery-color,wp-lists,postbox,nav-menu&ver=4.2.1'></script>
and that was
<script type='text/javascript' src='//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js?ver=1.8.3'></script>

This was called from …/enfold/config-layerslider/LayerSlider/wp/scripts.php and finally the culprit was the LayerSlider WP Advanced Setting “Use Google CDN version of jQuery”. Once disabled, the problem disappeared.

Just wanted to share it.