AppStore receipt missing expiry

The receipt I receive from the Api for an annual subscription does not contain "expires_date" value, where as a receipt for a monthly subscription does return the value. Both subscriptions are of type "auto-renewable". Why is this the case, when all subscriptions can contain an expiration/renewal date.

Auto renewable subscriptions are always expected to have an expires date. Please provide the receipt, request/response with verifyReceipt or server API’s in a ticket with FeedbackAssistant.Apple.com

AppStore receipt missing expiry
 
 
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