I tried to use handtracking in my own scene but the Grab class seems failed to get updated state code.
I have notice in sample scene the event doesn't have a parameter on Unity Editor GUI. But in my own scene there is always one. Is this causing the issue by overriding the state code from GestureProvider?
I use the player prefab provided by SteamVR, and I put GestureProvider under it's VRCamera. The camera tracking works fine.