Found the issue and the solution!
Basically, Apple TV logs in the sandbox user to be the default user on Apple TV automatically. That means, that a non-sandbox user gets logged and tries to make a sandbox purchase, which causes the error.
To solve this:
Settings
Users and Accounts
Sign out the Sandbox Account
Login with a normal sandbox user
Do the purchase.
Hope this helps!
mantasoff
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We have tried to test out Xcode 15.3 and it seems that the issue still occurs. tvOS 17.2
I did some testing on iOS 16.1. It timed out every 30 seconds.