settled the conflict by adding slug of the page in line 571 p01-contact.php
Code:
/*
* Return the html display of the form
* @return string the <form>
*/
public function html()
{
global $PageURL;
if ($PageURL=='') {
$PageURL=get_page_url(True);
}
$html = '<form action="'.$PageURL.'#p01-contact' . $this->id . '" autocomplete="off" ';