This code used to work about a month ago

PurchasesResource.SubscriptionsResource.DeferRequest request1 = purchase.Subscriptions.Defer(defRqst, gsPackageName, sSubscriptionName, sPurchaseToken);

I know the package name and subscription name are correct and thr token is passed across. The whole thing is in Alpha testing though, so could that be the issue. When it previously worked the whole testing regime offered by Google was different to now.

Does anybody know if you can test deferrals in a full alpha and beta testing environment or if things have changed recently.