New iOS14 Sandbox Manage IAPs feature not working

Checking out the new Sandbox testing capabilities in iOS14 as noted here: https://developer.apple.com/news/?id=nue1z72t

I am able to open a Manage screen for the Sandbox account (Settings > App Store > Sandbox Account > Manage), and see the expected In-App Purchase options listed for my test app. The Cancel mechanism works, as I can see autorenewstatus field update in the receipt after Canceling in the Sandbox Manage view.

But, resubscribing and upgrade/downgrade do not appear to be working as expected. Selecting a product from the Sandbox Manage screen causes IAP payment sheet (modal/dialog) to load as expected in the UI, and it says SANDBOX and for testing purposes as expected, but the account listed is the primary prod account for the device - not the expected Sandbox account. And clicking the Purchase button in this case prompts for PW for prod account and at same time indicates [Env: Sandbox] and does NOT result in a new transaction appearing in the App Store Receipt as I would expect.

Anyone else try this new Sandbox testing feature yet? If seeing same thing (especially the unexpected prod/sandbox account mismatch), any workarounds?
Hello! Actually I can't test in-app purchases of my app in tvOS 14. I can't find where to put the sandbox account in tvOS 14 to perform a purchase. Did Apple changed the way to test this? Everything I found in the web talks about In-App purchases on iOS 14, but not tvOS 14 process. How can I use a sandbox account in tvOS 14, physical device?
Hi,

I am also facing exactly the same issue.

Currently it is impossible to test subscription up and downgrading via the manage pages ui because it always uses the original apple account for the subscription purchase, this one actually goes through but it is then not actually renewed/updated and you simply don't get any notifications also the ui for managing the subscriptions doesn't update it simply stays the same.
New iOS14 Sandbox Manage IAPs feature not working
 
 
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