Mobile App Bug Fix — React Native / TypeScript

We have an existing React Native mobile application that needs a short round of bug fixing before the next release. Current issues: Some API requests are triggered multiple times during screen mount/navigation. Certain screens display stale data after create/update actions. App state is occasionally lost or restored incorrectly after background → foreground transitions. Authentication state can become inconsistent after token expiration. A few Android/iOS-specific runtime issues need to be reproduced and fixed. Some asynchronous operations continue after a screen has been unmounted, causing warnings and unexpected state updates. Scope Reproduce the issues, identify the root cause, implement targeted fixes, and verify the affected flows without rewriting the existing architecture. Please include a short example of a similar mobile debugging/bug-fixing project you've completed.