5.3.1

[5.3.1] - 2026-05-27

Added

• Xbox - Added purchase verification support through the Microsoft Store Collections service. See In-app purchases for Xbox games for more details.

Fixed

• Fixed compile errors caused by naming collisions when a project imports a third-party package that exposes a top-level UnityUtil namespace.
• Google - Fixed a race condition where purchases could be silently lost when FetchPurchases completed before FetchProducts populated the product details cache. Missing product details are now pre-fetched before purchases are built.
• Google - Fixed a NullReferenceException when constructing a GooglePurchase for an owned purchase whose AccountIdentifiers are null (test purchases or apps that don't call SetObfuscatedAccountId).
• Google - Fixed a NullReferenceException in ProductDetailsConverter.BuildProductDescription when a product has no subscription offer details (returned as null by Google Play for non-subscription products).
• Google - Fixed a NullReferenceException where Purchase references received from QueryPurchasesAsync could become invalid across an async boundary. The references are now cloned to long-lived global JNI references inside the billing-client callback.