Steps to reproduce:
1. Open the “IN-130824” project
2. Build And Run
3. Observe the Xcode logs
Actual result: “NullReferenceException: Object reference not set to an instance of an object. at Newtonsoft.Json.Serialization.DefaultContractResolver.GetCallbackMethodsForType” error
Expected result: No errors logged
Reproducible with: 6000.0.66f1, 6000.3.5f1, 6000.4.0b5, 6000.5.0a1
Not reproducible with: 6000.5.0a5
Fixed in: 6000.5.0a2
Testing environment: macOS 26.2 (M4 Pro)
Not reproducible on: No other environment tested
Reproducible with these devices:
VLNQA00623 - iPhone 16 Plus (MXVY3QN/A), CPU: Apple A18 Pro, OS: 26.0.1
VLNQA00297 - iPhone 11 Pro (MWC62ET/A), CPU: Apple A13 Bionic, GPU: Apple designed, OS: 17.6.1
Notes:
- Not reproducible if “Use incremental GC” in Player settings → Other Settings is enabled
- Not reproducible on Xcode 16 (by user)