My app has been approved by Apple and is available on the App Store. However, it crashes on launch on some devices, while most of the other devices work fine. We've tried many things but still can't figure out the problem and also can't reproduce it. If you have any insights or suggestions on how we can proceed, please let us know, thanks! Some details that may help in identifying the issue App crashes on launch on some devices, but most devices work without issues. Issue reported in Singapore and Thailand, but not specific to the region as some other apps in those countries work well. One user experiencing the issue was on the same WiFi network as another user without the issue, suggesting that it was not a network-related problem. Sentry has been installed to catch errors but didn't detect any error when the app crashed on launch. This indicates that the issue may be happening before Sentry launches. Devices crashing are iPhone 13 (iOS 16.3, iOS 16.4) and iPhone 13 Pro (iOS 16.2). Tests on AWS Device Farm with iPhone 13 (iOS 16.0.2) and iPhone 13 Pro (iOS 15.2) (the only iOS versions supported) passed, suggesting that it's not a device-specific issue. Other information The app is developed by React Native (version 0.70.5), using the Expo framework (Expo SDK 47) The app is built by EAS CLI (version 3.10.0) (Expo Application Services) iOS crash log with the crashing thread Incident Identifier: 8B7F4A8D-E32F-4BAE-AAFB-D0F780929694 CrashReporter Key: ee432b7f594204dc754625e19ef274943345c9b1 Hardware Model: iPhone14,2 Process: MyApp [834] Path: /private/var/containers/Bundle/Application/87D1B99A-5144-426A-BB71-301F43FD507E/MyApp.app/MyApp Identifier: com.company.myapp Version: 1.0.0 (166) AppStoreTools: 14C17 AppVariant: 1:iPhone14,2:15 Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd [1] Coalition: com.company.myapp [854] Date/Time: 2023-04-16 10:54:07.0894 +0800 Launch Time: 2023-04-16 10:54:06.4107 +0800 OS Version: iPhone OS 16.3 (20D47) Release Type: User Baseband Version: 2.40.01 Report Version: 104 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Triggered by Thread: 4 Application Specific Information: abort() called Thread 4 name: Dispatch queue: expo.controller.errorRecoveryQueue Thread 4 Crashed: 0 libsystem_kernel.dylib 0x20a827674 __pthread_kill + 8 1 libsystem_pthread.dylib 0x21af8b1ac pthread_kill + 268 2 libsystem_c.dylib 0x1d4388c8c abort + 180 3 libc++abi.dylib 0x21aecab8c abort_message + 132 4 libc++abi.dylib 0x21aebaa80 demangling_terminate_handler() + 336 5 libobjc.A.dylib 0x1c5ea1d3c _objc_terminate() + 144 6 libc++abi.dylib 0x21aec9f28 std::__terminate(void (*)()) + 20 7 libc++abi.dylib 0x21aec9ec4 std::terminate() + 56 8 libdispatch.dylib 0x1d4324f9c _dispatch_client_callout + 40 9 libdispatch.dylib 0x1d432c640 _dispatch_lane_serial_drain + 672 10 libdispatch.dylib 0x1d432d18c _dispatch_lane_invoke + 384 11 libdispatch.dylib 0x1d4337e10 _dispatch_workloop_worker_thread + 652 12 libsystem_pthread.dylib 0x21af84df8 _pthread_wqthread + 288 13 libsystem_pthread.dylib 0x21af84b98 start_wqthread + 8 Full crash log crash-log-1.txt crash-log-2.txt crash-log-3.txt

Summary of my problem Our app has been rejected since the reviewer said that it crashed on launch. But when I installed the app from TestFlight on the same device with the same OS version, it works well. I've also tried to read the crash logs, but still can't figure out the problem. Can anyone help me to read the crash log or share similar experiences to find out what's going on? Thanks! Rejection message Guideline 2.1 - Performance - App Completeness We were unable to review your app as it crashed on launch. We have attached detailed crash logs to help troubleshoot this issue. Review device details: - Device type: iPad - OS version: iOS 16.1 What I've tried Download the app on iPad with IOS 16.1, and it's working well. Convert the .txt crash file to .ips file and use Console app on mac to read it. Found that it's a language exception, but still can't figure out the exact problem Other information The app is developed by React Native (version 0.68.2), using the Expo framework (Expo SDK 45) The app is built by EAS CLI (version 2.7.1) (Expo Application Services) Raw crash log files crashlog-AF1A4D33-52B2-4791-95F5-F3F78E5FF4BE.txt crashlog-50835170-9E1D-4912-80BE-094093962B1C.txt

The App review said that our App crashed on launch in Cork, Ireland. When they tested it in the U.S., it works well. We also don't have any problem testing it using TestFlight in Taiwan. We've tried to VPN to Ireland and open the app from TestFlight but it still works well. Does anyone have this regional problem or know how to reproduce it? Development environment The app is developed by React Native (version 0.70.5), using the Expo framework (Expo SDK 47)