In-App Purchases on Android not working

I can get consumable purchases to work setting the v2 store to “true” and using the v2 nodes. However subscriptions (non-consumable) fail. They dont seem to get a response from google play at all. The non-consumable boolean doesn’t appear to do anything. I have tried UE 4.25.3 and 4.26 without success (although both work with consumable).