In future version I will implement such feature but now you can fix it by replacing code:
$title = JCommentsObjectHelper::getTitle( $row->object_id, $row->object_group );
$title = JCommentsText::substr($title, $limit_object_title);
$title = str_replace( '"', '', $title );
with
$title = $row->title;
$title = str_replace( '"', '', $title );
and replace:
$query = "SELECT cc.id, cc.userid, cc.comment, cc.name, cc.username, cc.email, cc.date, cc.object_id, cc.object_group, '' as avatar "
with
$query = "SELECT cc.id, cc.userid, cc.comment, cc.name, cc.username, cc.email, cc.date, cc.object_id, cc.object_group, cc.title, '' as avatar "