I'm developing a React Native app using Expo, and I'm encountering crashes on iOS devices. The app is deployed via TestFlight and is also being tested on a physical iPhone. However, I'm struggling to interpret the iOS crash logs and pinpoint the root cause of the crashes.
Issue:
-The app runs fine in development mode. -On TestFlight and physical devices, it sometimes crashes without clear error messages in the Expo logs -Having difficulty reading the error logs
Errors: COSMCtrl applyPolicyDelta unexpected absence of policy on appRecord com.xxxxx.xxxx bg time + grace
BBRemoteDataProvider: <BBDataProviderIdentity 0x300534a00; com.xxxxx.xxxx> does not respond to noteSectionInfoDidChange:
Advisor: No handle found for currently focused PID: 72765; sceneIdentity: com.apple.frontboard.systemappservices/FBSceneManager:sceneID%3Acom.xxxxx.xxxxapp-default
[<_UIKeyboardArbiterClientHandle: 0x30111f8e0; [app<com.xxxxx.xxxx(9BD12DED-F3C3-4C92-82E5-0810D8796F6F)>:72765] <<UIKBArbiterClientFocusContext: 0x302fe1be0; contextID = 6ae54085; sceneIdentity = com.apple.frontboard.systemappservices/FBSceneManager:sceneID%3Acom.xxxxx.xxxx-default >>; hosting PIDs {( )}; level 0.000000; active NO [wants NO]; suppression 0; iav 0.000000; on screen NO; isAcquiringFocus: YES>] Acquiring focus timer elapsed, clearing acquiring focus state
What I've Tried:
-Checked Expo & React Native logs (npx expo start --clear). -Enabled Debug Mode on a physical iPhone (device logs via Console.app). -Reviewed Crash Logs in EAS. -Checked Apple Developer Logs. -Looked into App State Changes (AppState.addEventListener) since crashes sometimes happen when the app moves to the background.
Questions:
-How can I properly decode iOS crash logs to identify the cause? -Are there specific Expo or React Native debugging tools for analyzing iOS crashes? -Are there common issues with background execution policies that might cause this in React Native?
Tech Stack: React Native: 0.72+ Expo SDK: 49+ State Management: Context API + SQLite local storage Auth: SecureStore + JWT + API authentication Notifications: Expo Notifications API Backend: Node.js / Express (hosted on Heroku) Build System: EAS Build for iOS (Managed Workflow) iPhone Model: iPhone 13 (physical device)