[Plugin: Contact Form 7] process hangs after submit with custom action

I have added and action to contact form 7 processing
add_action('wpcf7_before_send_mail','log_emails_to_file_wpcf7');

the process completes, the email is logged, but the contact form success message is never processed, the cycling/thinking image just stays there with no indication of success.
custom code

function log_emails_to_file_wpcf7($args){
	if(check_log_directory() && check_log_file()){
		log_email(
			array(	'form'		=> $args->title,
				'from'		=> $args->posted_data['your-name'] . ' <' . $args->posted_data['your-email'] .'>',
				'to'		=> $args->mail['recipient'],
				'subject' 	=> $args->posted_data['your-subject'],
				'body'		=> preg_replace("/\n/", " " , $args->posted_data['your-message']),
				'url'		=> ''
			)
		);
	}
return true;
}

if I check the debugger it shows the success message but it is not showing on the screen