Same issues here on Unity 2020.4.40.f1. Can confirm that it only happens on ios 16.4 and above Crashed: com.apple.root.user-initiated-qos.cooperative 0 libsystem_kernel.dylib 0x7558 __pthread_kill + 8 1 libsystem_pthread.dylib 0x7118 pthread_kill + 268 2 libsystem_c.dylib 0x1d178 abort + 180 3 libswiftCore.dylib 0x3b93a8 swift::fatalError(unsigned int, char const*, ...) + 134 4 libswiftCore.dylib 0x3b93c8 swift::warningv(unsigned int, char const*, char*) + 30 5 libswiftCore.dylib 0x3bdfd8 swift_deallocPartialClassInstance + 190 6 libswiftCore.dylib 0x3bde28 _swift_release_dealloc + 56 7 libswiftCore.dylib 0x3bec4c bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 132 8 GameCenterFoundation 0xe213c __swift_project_boxed_opaque_existential_1 + 20184 Another people also reported on the forums https://forum.unity.com/threads/gamecenter-login-crash-since-16-4-1.1431688/ :Edit: unity forum link is also from the original poster on this thread