Spatialization is inaccurate on iOS/tvOS

Also occurs in 4.16

Tested on iPhone6S+_4982 OS: 10.2.1 and tvOS 10.2

1. Connect headphones to iOS device
2. Launch TM-AnimPhys map form QAGame onto iOS device
3. Navigate to the Spatialization test in the Audio section
4. Walk onto the platform in the middle

Result: The ball moves well to the left of the player but audio is only heard in the right ear. Audio doesn't start playing in the left ear until it is behind and to the left of the player.