parent node error with jQuery Mobile and jQuery.prototype.clone()

description.txt

I have a multipage document that includes, among others, a page like the following:

<div id="original" data-role="page">
    <form class="problematic" onsubmit="diagnostic();"></form>
</div>

At the bottom of the HTML (end of body) I have a script that clones this page, like this:

$('#original').clone().attr('id', 'copy').appendTo(document.body).page();

When I submit the copy of the form in the cloned page, the error is revealed in the submit handler with code like this:

function diagnostic(event) {
    console.log($(event.target).parent());  // prints $('#original') instead of $('#copy')
}