Don't want to bring up an old topic, but this is the exact issue I am now having on both of my cloud communities. Guest's have no posting permissions, but I do have "Post Before Registering" allowed. Guests are currently able to post replies to topics and send them for approval.
Guests are shown this message "You can post now and register later. If you have an account, sign in now to post with your account.", but when they add an email and submit the reply, it pops up that the post was sent for moderation approval and no registration form appears.
Recording 2024-02-13 150035.mp4