Xbox - Subscriptions issue

Question

Without any changes on the front or backend, the subscriptions flow on an existing xbox project is suddenly broken and purchases cannot be validated by the backend anymore.

Issue:

• As a user purchasing a subscription via Xbox doesn't result in the purchase being fully recognized and validated by the backend. Therefore the user doesn't get assigned a full member and cannot view content behind the paywall

Some more context:

• Our Xbox app is still able to make a payment request against the MSFT store and this purchase process between Xbox and Microsoft Store is successful
• The purchase is also registered as a new acquisition in the MSFT Store Dashboard
• In the purchase validation process, we are still able to successfully generate a valid AD access token, however it seems that we are not able to generate a ‘Microsoft Store ID Key’ as the GetCustomerPurchaseIdAsync returns undefined

Lastly, when trying to emulate this on a PC in order to debug, the purchase goes through just fine. The issue strangely only occurs on an Xbox.

Any help is appreciated.