Aplicación rechazada porque la aplicación se bloqueó cuando intentó download una de las compras en la aplicación

Estoy intentando lanzar mi nueva versión de la aplicación con las compras en la aplicación, pero Apple la rechazó dos veces con el siguiente problema:

Your app crashed when we: Attempted to download one of the In-App Purchases. This occurnetworking when your app was used: - Offline - On Wi-Fi 

Me enviaron dos loggings de locking que da los siguientes problemas:

El primer logging de locking :

 Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Subtype: EXC_ARM_SP_ALIGN at 0x000000013fd4582e Highlighted Thread: 1 Thread 0 name: Dispatch queue: com.apple.libdispatch-manager Thread 0: 0 libsystem_kernel.dylib 0x0000000197071aa8 kevent64 + 8 1 libdispatch.dylib 0x0000000196f75998 _dispatch_mgr_thread + 48 Thread 1 name: com.apple.NSURLConnectionLoader Thread 1: 0 libsystem_kernel.dylib 0x0000000197071ca0 mach_msg_trap + 8 1 CoreFoundation 0x0000000189f7eb70 __CFRunLoopServiceMachPort + 180 2 CoreFoundation 0x0000000189f7cd00 __CFRunLoopRun + 832 3 CoreFoundation 0x0000000189ebdc1c CFRunLoopRunSpecific + 448 4 Foundation 0x000000018aab2424 +[NSURLConnection(Loader) _resourceLoadLoop:] + 344 5 Foundation 0x000000018ab40408 __NSThread__main__ + 996 6 libsystem_pthread.dylib 0x000000019710be18 _pthread_body + 164 7 libsystem_pthread.dylib 0x000000019710bd70 _pthread_start + 136 8 libsystem_pthread.dylib 0x0000000197109550 thread_start + 0 Thread 2 name: com.apple.CFSocket.private Thread 2: 0 libsystem_kernel.dylib 0x000000019708a76c __select + 8 1 libsystem_pthread.dylib 0x000000019710be18 _pthread_body + 164 2 libsystem_pthread.dylib 0x000000019710bd70 _pthread_start + 136 3 libsystem_pthread.dylib 0x0000000197109550 thread_start + 0 Thread 3: 0 libsystem_kernel.dylib 0x0000000197071ca0 mach_msg_trap + 8 1 CoreFoundation 0x0000000189f7eb70 __CFRunLoopServiceMachPort + 180 2 CoreFoundation 0x0000000189f7cd00 __CFRunLoopRun + 832 3 CoreFoundation 0x0000000189ebdc1c CFRunLoopRunSpecific + 448 4 CoreFoundation 0x0000000189f132a4 CFRunLoopRun + 108 5 CoreMotion 0x000000018a676538 0x18a638000 + 255288 6 libsystem_pthread.dylib 0x000000019710be18 _pthread_body + 164 7 libsystem_pthread.dylib 0x000000019710bd70 _pthread_start + 136 8 libsystem_pthread.dylib 0x0000000197109550 thread_start + 0 Thread 4: 0 libsystem_kernel.dylib 0x000000019708ae74 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x0000000197109548 start_wqthread + 0 Thread 5: 0 libsystem_kernel.dylib 0x000000019708ae74 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x0000000197109548 start_wqthread + 0 Thread 6: 0 libsystem_kernel.dylib 0x000000019708ae74 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x0000000197109548 start_wqthread + 0 Thread 7: 0 libsystem_kernel.dylib 0x000000019708ae74 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x0000000197109548 start_wqthread + 0 

y el segundo:

 Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS at 0x000000013fefffb0 Highlighted Thread: 1 Thread 0 name: Dispatch queue: com.apple.libdispatch-manager Thread 0: 0 libsystem_kernel.dylib 0x0000000197071aa8 kevent64 + 8 1 libdispatch.dylib 0x0000000196f75998 _dispatch_mgr_thread + 48 Thread 1 name: com.apple.NSURLConnectionLoader Thread 1: 0 libsystem_kernel.dylib 0x0000000197071ca0 mach_msg_trap + 8 1 CoreFoundation 0x0000000189f7eb70 __CFRunLoopServiceMachPort + 180 2 CoreFoundation 0x0000000189f7cd00 __CFRunLoopRun + 832 3 CoreFoundation 0x0000000189ebdc1c CFRunLoopRunSpecific + 448 4 Foundation 0x000000018aab2424 +[NSURLConnection(Loader) _resourceLoadLoop:] + 344 5 Foundation 0x000000018ab40408 __NSThread__main__ + 996 6 libsystem_pthread.dylib 0x000000019710be18 _pthread_body + 164 7 libsystem_pthread.dylib 0x000000019710bd70 _pthread_start + 136 8 libsystem_pthread.dylib 0x0000000197109550 thread_start + 0 Thread 2 name: com.apple.CFSocket.private Thread 2: 0 libsystem_kernel.dylib 0x000000019708a76c __select + 8 1 libsystem_pthread.dylib 0x000000019710be18 _pthread_body + 164 2 libsystem_pthread.dylib 0x000000019710bd70 _pthread_start + 136 3 libsystem_pthread.dylib 0x0000000197109550 thread_start + 0 Thread 3 name: WebThread Thread 3: 0 libsystem_kernel.dylib 0x0000000197071ca0 mach_msg_trap + 8 1 CoreFoundation 0x0000000189f7eb70 __CFRunLoopServiceMachPort + 180 2 CoreFoundation 0x0000000189f7cd00 __CFRunLoopRun + 832 3 CoreFoundation 0x0000000189ebdc1c CFRunLoopRunSpecific + 448 4 WebCore 0x0000000193aabfd8 RunWebThread(void*) + 468 5 libsystem_pthread.dylib 0x000000019710be18 _pthread_body + 164 6 libsystem_pthread.dylib 0x000000019710bd70 _pthread_start + 136 7 libsystem_pthread.dylib 0x0000000197109550 thread_start + 0 Thread 4 name: JavaScriptCore::BlockFree Thread 4: 0 libsystem_kernel.dylib 0x000000019708a394 __psynch_cvwait + 8 1 JavaScriptCore 0x000000018b1a6858 JSC::BlockAllocator::blockFreeingThreadMain() + 248 2 JavaScriptCore 0x000000018b1a2330 WTF::wtfThreadEntryPoint(void*) + 20 3 libsystem_pthread.dylib 0x000000019710be18 _pthread_body + 164 4 libsystem_pthread.dylib 0x000000019710bd70 _pthread_start + 136 5 libsystem_pthread.dylib 0x0000000197109550 thread_start + 0 Thread 5 name: JavaScriptCore::Marking Thread 5: 0 libsystem_kernel.dylib 0x000000019708a394 __psynch_cvwait + 8 1 JavaScriptCore 0x000000018b3ce514 JSC::GCThread::waitForNextPhase() + 104 2 JavaScriptCore 0x000000018b3ce5a8 JSC::GCThread::gcThreadMain() + 88 3 JavaScriptCore 0x000000018b1a2330 WTF::wtfThreadEntryPoint(void*) + 20 4 libsystem_pthread.dylib 0x000000019710be18 _pthread_body + 164 5 libsystem_pthread.dylib 0x000000019710bd70 _pthread_start + 136 6 libsystem_pthread.dylib 0x0000000197109550 thread_start + 0 Thread 6: 0 libsystem_kernel.dylib 0x000000019708ae74 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x0000000197109548 start_wqthread + 0 Thread 7: 0 libsystem_kernel.dylib 0x0000000197071ca0 mach_msg_trap + 8 1 CoreFoundation 0x0000000189f7eb70 __CFRunLoopServiceMachPort + 180 2 CoreFoundation 0x0000000189f7cd00 __CFRunLoopRun + 832 3 CoreFoundation 0x0000000189ebdc1c CFRunLoopRunSpecific + 448 4 libAVFAudio.dylib 0x0000000188d5d5ec GenericRunLoopThread::Entry(void*) + 156 5 libAVFAudio.dylib 0x0000000188d5201c CAPThread::Entry(CAPThread*) + 100 6 libsystem_pthread.dylib 0x000000019710be18 _pthread_body + 164 7 libsystem_pthread.dylib 0x000000019710bd70 _pthread_start + 136 8 libsystem_pthread.dylib 0x0000000197109550 thread_start + 0 Thread 8: 0 libsystem_kernel.dylib 0x0000000197071ca0 mach_msg_trap + 8 1 CoreFoundation 0x0000000189f7eb70 __CFRunLoopServiceMachPort + 180 2 CoreFoundation 0x0000000189f7cd00 __CFRunLoopRun + 832 3 CoreFoundation 0x0000000189ebdc1c CFRunLoopRunSpecific + 448 4 CoreFoundation 0x0000000189f132a4 CFRunLoopRun + 108 5 CoreMotion 0x000000018a676538 0x18a638000 + 255288 6 libsystem_pthread.dylib 0x000000019710be18 _pthread_body + 164 7 libsystem_pthread.dylib 0x000000019710bd70 _pthread_start + 136 8 libsystem_pthread.dylib 0x0000000197109550 thread_start + 0 Thread 9: 0 libsystem_kernel.dylib 0x000000019708ae74 __workq_kernreturn + 8 1 libsystem_pthread.dylib 0x0000000197109548 start_wqthread + 0 

Mi aplicación funciona bien en tres dispositivos que he probado (iPhone 4, iPhone5 e iPad), no se bloquea y puedo comprar en aplicaciones sin ningún problema. Mi aplicación responde a la accesibilidad de la networking, así que la he probado cuando el dispositivo está en modo fuera de línea, Wi-Fi solo y cuando la accesibilidad cambia mientras el usuario compra los InApp. He leído e intentado analizar estos loggings de lockings, también he comprobado las memory leaks con Asignaciones y Fugas y las advertencias de baja memory con Zombies en Xcode Instruments, pero parece que no encuentro nada malo con mi código.

¿Me puede dar un poco de ayuda sobre qué debo hacer y dónde debo mirar con más cuidado?

¿Ha intentado probar con una count de sandbox recién creada?