Published onMarch 17, 2026An await That Resolves to undefined: The Mechanism Ledger of Runtime Boundaries, Silent Fallback, and "Shape Constraints"React-NativeReact-QueryHermesAsyncMechanism-AnalysisWhy async/await on this one specific queryFn boundary turns an already-resolved value into undefined on Hermes — and how silent fail-soft disguises it as a harmless feature flag.