This is on unity Engine 4.7.2 with the WWise 2015.1.9 build 5624 integration.
This is the code where it crashes:
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Thread 32 Crashed:
0 legends 0x0000000104edcbd0 CAkPBI::Term+ 47631312 (bool) + 1020
1 legends 0x0000000104edcbc0 CAkPBI::Term+ 47631296 (bool) + 1004
2 legends 0x0000000104f0f314 CAkURenderer::PerformContextNotif+ 47837972 () + 224
3 legends 0x0000000104eac3a0 CAkAudioMgr::Perform+ 47432608 () + 408
4 legends 0x0000000104f11098 CAkAudioThread::EventMgrThreadFunc+ 47845528 (void*) + 56
5 libsystem_pthread.dylib 0x0000000181d0d220 _pthread_body + 272
6 libsystem_pthread.dylib 0x0000000181d0d110 _pthread_body + 0
7 libsystem_pthread.dylib 0x0000000181d0bb10 thread_start + 4
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Thread 32 Crashed:
0 legends 0x00000001035bedb8 CAkBankMgr::UnloadMedia+ 47459768 (CAkUsageSlot*) + 100
1 legends 0x00000001035bed8c CAkBankMgr::UnloadMedia+ 47459724 (CAkUsageSlot*) + 56
2 legends 0x00000001035bec68 CAkUsageSlot::Release+ 47459432 (bool) + 172
3 legends 0x00000001035e8bdc CAkPBI::Term+ 47631324 (bool) + 1032
4 legends 0x000000010361b314 CAkURenderer::PerformContextNotif+ 47837972 () + 224
5 legends 0x00000001035b83a0 CAkAudioMgr::Perform+ 47432608 () + 408
6 legends 0x000000010361d098 CAkAudioThread::EventMgrThreadFunc+ 47845528 (void*) + 56
7 libsystem_pthread.dylib 0x0000000181d0d220 _pthread_body + 272
8 libsystem_pthread.dylib 0x0000000181d0d110 _pthread_body + 0
9 libsystem_pthread.dylib 0x0000000181d0bb10 thread_start + 4
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