Using Tobii Pro SDK for Unity v1.11.0.1308, I found that scenes with the SDK prefabs would freeze whenever I try to exit play mode or quit the built application. The demo scene (ScreenBasedPrefabDemo.unity) can exit without freezing, but only if I hit the esc button. As far as I know, the esc button only triggers Application.Quit(), and calling that in any other scene doesn’t help with freezing. What do I have to do to properly stop eye tracker operations?