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...