Hi, we've got exactly the same problem as this thread https://forums.developer.amazon.com/questions/14909/app-getting-rejected-due-to-iap-not-working-during.html
Our app update constantly gets rejected with very little information other than an error only the app reviewer sees. The app works in Live Testing and an older version of the app which is live works as expected. In addition to this the logs provided by the amazon reviewer are old and not from the version being reviewed, they're also identical (down to the timestamp) on every device they list as tested.
How do we move forward? Please help.