Steps to repro.
1. Make sure "Disable Unity Audio" is unchecked. So both Unity and Wwise audio engines are both enabled.
2. Deploy on tvOS 14.x
3. Note. This does not crash on iOS
Unity 2020.3.5f1
Wwise 2021.1.0.7575
Crash logs
Thread 38 Crashed:
0 UnityFramework 0x0000000100d80e2c CAkSinkiOS::Configure(AkChannelConfig&) + 11914796 (AkSink.cpp:186)
1 UnityFramework 0x0000000100d80dfc CAkSinkiOS::Configure(AkChannelConfig&) + 11914748 (AkSink.cpp:170)
2 UnityFramework 0x0000000100d80bc0 CAkSinkiOS::Activate(AkChannelConfig&) + 11914176 (AkSink.cpp:269)
3 UnityFramework 0x0000000100cfb2e4 AkDevice::CreateSink() + 11367140 (AkOutputMgr.cpp:1284)
4 UnityFramework 0x0000000100cfba7c CAkOutputMgr::InitDevice(AkDevice*&) + 11369084 (AkOutputMgr.cpp:1417)
5 UnityFramework 0x0000000100cfc518 CAkOutputMgr::_AddOutputDevice(unsigned long long, AkOutputSettings&, unsigned int, AkSet<unsigned long long, AkHybridAllocator<8u, (unsigned char)16, (AkMemID)4>, AkGrowByPolicy_Proportional>&, AkSetType, bool, bool, bool) + 11371800 (AkOutputMgr.cpp:1598)
6 UnityFramework 0x0000000100cfd324 CAkOutputMgr::InitMainDevice(AkOutputSettings const&) + 11375396 (AkOutputMgr.cpp:1716)
7 UnityFramework 0x0000000100ca9f54 CAkAudioMgr::ProcessMsgQueue(bool, bool&) + 11034452 (AkAudioMgr.cpp:0)
8 UnityFramework 0x0000000100ca8e44 CAkAudioMgr::Perform(bool) + 11030084 (AkAudioMgr.cpp:522)
9 UnityFramework 0x0000000100d56434 CAkAudioThread::EventMgrThreadFunc(void*) + 11740212 (AkAudioThread.cpp:68)
10 libsystem_pthread.dylib 0x0000000191f93db8 _pthread_start + 288
11 libsystem_pthread.dylib 0x0000000191f9c59c thread_start + 8