Guests can enter comments although they are blocked from commenting.

Hi wpDiscuz Team & Community,

1. I do not want to allow guests/non-logged-in visitors to be able to comment.
2. In WordPress Settings > Discussion Settings I've selected "Users must be registered and logged in to comment. Please see the attachment.
3. However, the comment box still allows guests to comment by entering their name, email and captcha. Please see the attachment.

I've checked every possible setting in WordPress and wpDiscuz but can't figure out the issue. Please help.

Regards,

Khalid Mian