Why React Native apps work in debug but fail in release

If a React Native app works perfectly in debug, but breaks in release, the problem is often not in the feature itself. That difference usually points to an environment or build configuration issue. I ran into this pattern multiple times while debugging React Native Android problems, and one of the biggest lessons is this: If debug works and release fails, stop looking only at your app logic. Start checking what changes between the two builds. This post is a practical breakdown of the most common causes I would check first. Why this happens Debug and release are not the same environment. A release build can behave differently because of: different signing minification / shrinking different initialization order stricter platform checks native setup differences missing environment variables or config values That is why something that seems “random” in release often has a very specific cause. What I would check first 1. App Check / release-only Firebase enforcement This is one of the first