Load and Save InputActionAsset to/from JSON

Unity Engine
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1

I tried to load an InputSystemAsset from a JSON file and overwrite it so that all InputActionProperty’s that use the asset receive the new actions.
I have tried to use the LoadFromJson method to do this. The asset is also loaded correctly - but the InputActionProperty’s are not updated and the old actions are still used. Here is my code:

        public class InputLoader : MonoBehaviour
	{
		public InputActionAsset asset;
		
		public void Awake()
		{
			if(!Application.isEditor)
			{
				var file = Path.Combine(Application.dataPath, "..", "input.json");
			
				if(!File.Exists(file))
					File.WriteAllText(file, asset.ToJson());
				else
					asset.LoadFromJson(File.ReadAllText(file));

				Debug.LogWarning(asset.FindActionMap("Camera").FindAction("Move"));
				asset.Enable();
			}
		}
	}

Have I forgotten something or am I doing something wrong? Thanks.