Hello, since launch we've been getting several reports of IAPs that are not granted (I'd say about 5%-10% of transactions, which is a lot). It happens to all platforms, all products pretty equally (Consumable, non consumable) and all nationalities. I searched the event history of requesting users and never seen any event related to purchase. I'm not sure if a validation failure is logged in Playfab?
I manually granted them the items to people who provided a screenshot of their store receipt and it worked, which leads me to believe that indeed the item was bought. Do I need to put something in place, a fail-safe that retries the validation after a short while or something? If so did I miss any documentation saying so? Because I have seen no resource that would say this.