JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="working" class="styled">
    <li>one</li>
    <li>two</li>
    <li>three</li>
</ul>
<br />
<ul id="broken" class="styled">
    <li>one</li>
    <li>two</li>
    <li>three</li>
</ul>

CSS

.styled { color:blue; }

JavaScript

$('#working').sortable({
    appendTo: 'body',
    helper: function(event,$item){
        var $helper = $('<ul></ul>').addClass('styled');
        return $helper.append($item.clone());
    }
});
    
$('#broken').sortable({
    appendTo: 'body',
    helper: 'clone'
});