To reproduce:
1. Open attached project ""
2. Open "IAP Demo.unity" scene
3. Set up a Non-Renewable subscription in iTunes connect (you can find the item ID in "IAPDemo.cs" script line 539)
4. Build for iOS
5. Deploy the Xcode project to iOS device
6. Buy the Non-Renewable subscription
7. In Xcode console search "subscription next billing date is: "

Expected: getExpireDate shows a valid expiration date or "Unsupported"
Actual: getting the next billing date: 1/1/0001 12:00:00 AM

Reproduced on:
2017.4.32f1 2018.4.6f1 2019.1.14f1 2019.2.1f1 2019.3.0a12

Device reproduced on:
iPhone XR iOS 12.0

Package version:
- 2.0.6
- 2.0.3

Notes:
- Errors building the projet with 2.0.0 package version
- Unable to test on 2.0.1. IAP doesn't connect on the iOS device