Log in with user demo p/w demo99 and select shopping lists under the Menu Planning menu then open the dropdown on any select then open the menu on the left by hitting the three lines at the top left.
combo have inner handler attached to document.body, which listen to “click” event and close opened bar if any. when you clicking on “three lines” something stops event (like event.cancelBubble = true)
I have applied the javascript fix. But if you have the left sidebar open - see demo instructions earlier - and then open the combo then the box is in the wrong place