Comment not approved automatically
Please note: either wpDiscuz or wpDiscuz Frontend Moderation has no any relation to it. The addon is designed to manage comments on front-end. It allows the website admins to approve new comments, unapprove automatically approved bad comments, put those in spam, send an email to comment author, move the certain comment to another post, add comment author to blacklist and trash or permanently deleted.
Please try to deactivate Antispam plugins and check again.