I am using Unity 2017.3.1p1 for my game which has more than a million DAU. I started to receive thousands of crashes from iOS 12 devices lately. What could be the reason for this crash? Here is the call stack: Code (CSharp): Thread 0 libsystem_kernel.dylib 0x232db4f0c __psynch_cvwait + 8 1 libsystem_pthread.dylib 0x232e31d7c _pthread_cond_wait$VARIANT$mp + 688 2 amy 0x10211448c il2cpp::os::posix::PosixWaitObject::Wait(unsigned int, bool) (PosixWaitObject.cpp:156) 3 amy 0x102130fdc il2cpp::vm::Monitor::TryWait(Il2CppObject*, unsigned int) (Monitor.cpp:620) 4 amy 0x100d7f844 ThreadedLogger_ClearBuffer_m284959947 (Bulk_Assembly-CSharp_19.cpp:16842) 5 amy 0x10176aa88 RuntimeInvoker_Void_t1185182177(void (*)(), MethodInfo const*, void*, void**) (Il2CppInvokerTable.cpp:39507) 6 amy 0x10213d668 il2cpp::vm::Runtime::DelegateInvoke(Il2CppDelegate*, void**, Il2CppException**) (Runtime.cpp:410) 7 amy 0x102105080 il2cpp::icalls::mscorlib::System::Threading::ThreadStart(void*) (Thread.cpp:160) 8 amy 0x1021100b0 il2cpp::os::Thread::RunWrapper(void*) (Thread.cpp:169) 9 amy 0x102117c08 il2cpp::os::ThreadImpl::ThreadStartWrapper(void*) (ThreadImpl.cpp:106) 10 libsystem_pthread.dylib 0x232e392fc _pthread_body + 128 11 libsystem_pthread.dylib 0x232e3925c _pthread_start + 48 12 libsystem_pthread.dylib 0x232e3cd08 thread_start + 4