Subscription Completed with Payment Email not sending

I am trying to get the emails working with Membership 2 Pro. I can't get the email 'subscription completed with payment' to send. I have tried both manually setting up a membership, making an invoice for them and then saying that invoice was paid, and also I have tried registering through the online page and paying with paypal sandbox.

Other emails such as the 'sign up - user account created' one is sending.

I have checked for a conflict with other plugins.

I have noticed that when I manually set up a membership it also doesn't automatically make an invoice. Is that right?