We are encountering an issue in an iOS application where functionality works correctly in Debug builds but fails in Release builds distributed via TestFlight. Details Debug (No Optimization -Onone): Works correctly Release (Optimize for Speed -O): Fails Release with -Onone: Works, but app size nearly doubles Context The issue is related to integration with the Microsoft ONNX runtime library. It appears that the Swift/Clang compiler is aggressively optimizing certain parts of the code in Release builds, possibly removing or altering required logic. Observations The issue started appearing with recent iOS/Xcode updates. No code changes affecting this logic were made recently. Behavior strongly suggests optimization-related side effects. Questions Are there known issues with aggressive optimization (-O) affecting third-party libraries? Are there recommended flags to selectively disable optimization for specific modules or functions? Any tools or diagnostics to identify what is being optimized out? Temporary Workaround Using -Onone resolves the issue but is not viable for production due to significant increase in app size. Any guidance would be greatly appreciated.

Apple Pay processed a transaction but the account has insufficient funds. Later the transaction is declined. Is it expected from Apple Pay? Does Apple Pay throws an error if the account has insufficent funds- iOS Swift ? Does anyone know the code to handle this scenario in Swift iOS?

I built the app with Xcode 13.1. It works well when running through Xcode but does not launch when we download it from TestFlight. This results in rejection of the app in Apple review. Please find the attached logs sent by the Apple review team. Crash report.txt