PHP & IMAP: EmailReplyParser not returning message - php

Question

I'm using the EmailReplyParser by Will Durand and the getContent() method doesn't appear to be returning anything.
// Code adapted from "Retrieve Your Gmail Emails Using PHP and IMAP" by David Walsh ( https://davidwalsh.name/gmail-php-imap ).
// Reference: http://php.net/manual/en/function.imap-open.php
public function imap () {
$array_messages = array();
// Attempt a connection.
$this->inbox = imap_open($this->array_parameters['hostname'], $this->array_parameters['username'], $this->array_parameters['password']) or die("I cannot connect: " . imap_last_error());
// Grab the Messages.
$emails = imap_search($this->inbox, 'ALL');
if( is_array($emails) && ( count($emails) > 0 ) ):
$user = $this->flexi_auth->get_user_identity();
// Organise the Messages in chronological order.
rsort($emails);
foreach($emails as $email_number):
$note_id = 0;
if ( $user == $this->flexi_auth->get_user_identity() ):
// Get the information specific to each Message.
$overview = imap_fetch_overview($this->inbox, $email_number, 0);
$message = imap_fetchbody($this->inbox, $email_number, 2);
// Get the meta data.
$array_messages['seen'] = $overview[0]->seen;
$array_messages['subject'] = $overview[0]->subject;
$array_messages['from'] = $overview[0]->from;
// Format the time.
$date = DateTime::createFromFormat( 'D, d M Y H:i:s O', $overview[0]->date);
$array_messages['date'] = $date->format('Y-m-d H:i:s');
// Get the Message.
$objMessage = (new EmailParser())->parse($message);
$fragment = current($objMessage->getFragments());
$array_messages['message'] = $fragment->getContent();
endif;
$note_id = $this->messages_model->add(
$array_messages['from'],
$array_messages['date'],
$array_messages['seen'],
$array_messages['message'],
$array_messages['subject']
);
if ( $note_id > 0 ):
imap_delete($this->inbox, $email_number);
endif;
endforeach;
endif;
imap_close($this->inbox, CL_EXPUNGE);
return true;
}
If I swap $fragment->getContent() for quoted_printable_decode($message), everything works.
I'm not seeing any errors with EmailReplyParser in so far as referencing it (the installation via Composer went without a problem).