Astonishing, December now and it's still the case that adding a multi-value key to the settings bundle makes the app settings disappear completely from the iOS Settings app. Just updated to 18.1.1 and it's still broken.

Hello, did you find an answer to this please?

In my case the problem turned out to be that the projection matrix I was using was not invertible. This causes SCNRenderer's hitTest() and unprojectPoint() functions to fail.

Same problem here. Have tried everything and there is never any result from SCNRenderer.hitTest(). I think there's something in the SceneKit render loop that prepares nodes for hit-testing, and that something is missing when there's no SCNView. Thought it might have been SCNTransaction.flush() but that doesn't help.