iOS In-App Purchase sandbox test account keeps popping up for verification

Question

I have Auto-Renewable In-App Purchase item in my application which is in development stage. I could able to test the complete transaction till 2 days ago with different sandbox

Answer 1

Finally it's working, sort of.

1. Make a fresh sandbox account.
2. Confirm it after receiving the email
3. Login in your app
4. If a Change password dialog appears, then change your password you confirmed a few seconds ago...
5. ...and then it works.

Don't try to use accounts you have made the past few days before 13 January 2017, these are currently unusable.