Hello to everyone! We are getting this crash at 4% of our users and it occuries right at start of application, so the users can't open the app :( The problem is that we can't repeat this crash at our test devices, though we tried A LOT of them. So the main question is - How to detect location of the issue if we can't repeat the crash at our test devices? If you have ANY ideas how we can solve this issue, we would be very grateful! Thanks in advance! Crashed: Thread EXC_BAD_ACCESS 0x0000000000000001 0 QuartzCore CA::Layer::retain_parent(CA::Transaction*) const + 60 1 QuartzCore CA::Layer::retain_parent(CA::Transaction*) const + 52 2 QuartzCore CALayerGetSuperlayer + 56 3 UIKitCore -[UIView(UIKitManual) superview] + 56 4 UIKitCore -[UIView _updateSafeAreaInsets] + 64 5 UIKitCore -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2836 6 QuartzCore -[CALayer layoutSublayers] + 308 7 QuartzCore CA::Layer::layout_if_needed(CA::Transaction*) + 548 8 QuartzCore CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 144 9 QuartzCore CA::Context::commit_transaction(CA::Transaction*, double, double*) + 500 10 QuartzCore CA::Transaction::commit() + 684 11 QuartzCore CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 96 12 CoreFoundation __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36 13 CoreFoundation __CFRunLoopDoObservers + 572 14 CoreFoundation __CFRunLoopRun + 1052 15 CoreFoundation CFRunLoopRunSpecific + 600 16 GraphicsServices GSEventRunModal + 164 17 UIKitCore -[UIApplication _run] + 1072 18 UIKitCore UIApplicationMain + 168 19 Slowdive (Missing) 20 libdyld.dylib start + 4 com.apple.uikit.eventfetch-thread 0 libsystem_kernel.dylib mach_msg_trap + 8 1 libsystem_kernel.dylib mach_msg + 76 2 CoreFoundation __CFRunLoopServiceMachPort + 372 3 CoreFoundation __CFRunLoopRun + 1212 4 CoreFoundation CFRunLoopRunSpecific + 600 5 Foundation -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 232 6 Foundation -[NSRunLoop(NSRunLoop) runUntilDate:] + 92 7 UIKitCore -[UIEventFetcher threadMain] + 516 8 Foundation __NSThread__start__ + 864 9 libsystem_pthread.dylib _pthread_start + 320 Thread 0 libsystem_kernel.dylib __semwait_signal + 8 1 libsystem_c.dylib nanosleep + 216 2 libsystem_c.dylib sleep + 48 3 YandexMobileMetricaCrashes YMM__ksccd_init + 968 4 libsystem_pthread.dylib _pthread_start + 320 KSCrash Exception Handler (Secondary) 0 libsystem_kernel.dylib mach_msg_trap + 8 1 libsystem_kernel.dylib mach_msg + 76 2 YandexMobileMetricaCrashes YMM__kscm_machexception_getAPI + 1012 3 libsystem_pthread.dylib _pthread_start + 320 KSCrash Exception Handler (Primary) 0 (Missing) (Missing) com.google.firebase.crashlytics.MachExceptionServer 0 libsystem_kernel.dylib mach_msg_trap + 8 1 libsystem_kernel.dylib mach_msg + 76 2 FirebaseCrashlytics FIRCLSMachExceptionMaskForSignal + 1080 3 libsystem_pthread.dylib _pthread_start + 320 com.apple.NSURLConnectionLoader 0 libsystem_kernel.dylib mach_msg_trap + 8 1 libsystem_kernel.dylib mach_msg + 76 2 CoreFoundation __CFRunLoopServiceMachPort + 372 3 CoreFoundation __CFRunLoopRun + 1212 4 CoreFoundation CFRunLoopRunSpecific + 600 5 CFNetwork (Missing) 6 Foundation __NSThread__start__ + 864 7 libsystem_pthread.dylib _pthread_start + 320 AVAudioSession Notify Thread 0 libsystem_kernel.dylib mach_msg_trap + 8 1 libsystem_kernel.dylib mach_msg + 76 2 CoreFoundation __CFRunLoopServiceMachPort + 372 3 CoreFoundation __CFRunLoopRun + 1212 4 CoreFoundation CFRunLoopRunSpecific + 600 5 AudioSession GenericRunLoopThread::Entry(void*) + 164 6 AudioSession CAPThread::Entry(CAPThread*) + 92 7 libsystem_pthread.dylib _pthread_start + 320 Thread 0 libsystem_kernel.dylib __accept + 8 1 YandexMobileMetrica ymm__wifi_network__free_unpacked + 20308 2 YandexMobileMetrica ymm__event_data__free_unpacked + 110168 3 libdispatch.dylib _dispatch_call_block_and_release + 32 4 libdispatch.dylib _dispatch_client_callout + 20 5 libdispatch.dylib _dispatch_lane_serial_drain + 620 6 libdispatch.dylib _dispatch_lane_invoke + 404 7 libdispatch.dylib _dispatch_workloop_worker_thread + 764 8 libsystem_pthread.dylib _pthread_wqthread + 276 Thread 0 libsystem_pthread.dylib start_wqthread + 0 Thread 0 libsystem_kernel.dylib __workq_kernreturn + 8 1 libsystem_pthread.dylib _pthread_wqthread + 352 Thread 0 libsystem_kernel.dylib __workq_kernreturn + 8 1 libsystem_pthread.dylib _pthread_wqthread + 352 Thread 0 libsystem_kernel.dylib __workq_kernreturn + 8 1 libsystem_pthread.dylib _pthread_wqthread + 352 Thread 0 libsystem_kernel.dylib semaphore_timedwait_trap + 8 1 libdispatch.dylib _dispatch_sema4_timedwait + 64 2 libdispatch.dylib _dispatch_semaphore_wait_slow + 76 3 libdispatch.dylib _dispatch_worker_thread + 304 4 libsystem_pthread.dylib _pthread_start + 320 Thread 0 libsystem_kernel.dylib semaphore_timedwait_trap + 8 1 libdispatch.dylib _dispatch_sema4_timedwait + 64 2 libdispatch.dylib _dispatch_semaphore_wait_slow + 76 3 libdispatch.dylib _dispatch_worker_thread + 304 4 libsystem_pthread.dylib _pthread_start + 320 Thread 0 libsystem_kernel.dylib semaphore_timedwait_trap + 8 1 libdispatch.dylib _dispatch_sema4_timedwait + 64 2 libdispatch.dylib _dispatch_semaphore_wait_slow + 76 3 libdispatch.dylib _dispatch_worker_thread + 304 4 libsystem_pthread.dylib _pthread_start + 320 Thread 0 libsystem_kernel.dylib semaphore_timedwait_trap + 8 1 libdispatch.dylib _dispatch_sema4_timedwait + 64 2 libdispatch.dylib _dispatch_semaphore_wait_slow + 76 3 libdispatch.dylib _dispatch_worker_thread + 304 4 libsystem_pthread.dylib _pthread_start + 320