New user gets added to group but is not enabled

Hello,
I upgraded to the latest version of ES and I was very glad to see the option to automatically add a newly registered user to a group (if this is not a new option then I must have missed it somehow). This is very useful in the case of the project I'm currently working on. However there's just one little glitch - the new user registers, then the admin approves them and they are correctly added as a member of the group but they are not enabled. From what I tested this actually allows the user to access the group (it's invite-only) but they don't appear in the list of members and they can't see the group activity until someone goes to the back-end and enables them within the group. Since they get added automatically then they should also get enabled automatically, that would save the admin from going to the back-end and all they needed to do is click the Approve button in the notification email and everything else would happen automatically.
Thanks for looking into it,
Michael