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
no idea I have created multiple sandbox users never found this issue ever
https://forums.developer.apple.com/message/204979#204979
Its working great... 1. You need to create another test id from your iTunes account. 2. It will prompt to signing to settings. 3. Go there and change the password. 4. Now come back to app. and purchase any item. It will allow you to buy that item...
Finally it's working, sort of.
Don't try to use accounts you have made the past few days before 13 January 2017, these are currently unusable.
Came to know this is an issue from Apple side, which they are aware of now and working on it.
https://forums.developer.apple.com/message/204979#204979