There are 2 functions responsible for confirming user email, UserEmail.confirmByCode and UserEmail.confirmByyUid https://github.com/NodeBB/NodeBB/blob/master/src/user/email.js#L180-L254. When a user clicks the confirmation link in the email the first one is used. But there are other ways that can confirm the email via confirmByUid (for example an admin doing it from the ACP or a plugin directly confirming it by calling that function). I suggest checking if anything is calling confirmByUid other than the email -> confirm flow.

@mutahar-ali You'd probably want to move the redis server to another machine in that case. Either a separate one, or on the same machine as the Mongo database.

Is there a way to enable registration queue but make it so that user's registering with admin invites are able to register bypassing registration queue and admin approval? Since it would only make sense since the admins are the ones who invited the user. Many thanks!