Haptics SDK for Unity not working

I'm trying out the new Haptics SDK for Unity

I want to test it by playing a single haptic, but when I use this script I get an error with no haptics (testing in Unity editor 2022.2.13, with Air Link to a Quest 2)

Script:

public class OculusHapticClipTest : MonoBehaviour
{
    [SerializeField] private HapticClip _hapticClip;
    private HapticClipPlayer _hapticClipPlayer;

    private void Start()
    {
        _hapticClipPlayer = new HapticClipPlayer(_hapticClip);
        _hapticClipPlayer.Play(HapticInstance.Hand.Left);
    }
}

Error:

Error: HapticsSDK has already been initialized
UnityEngine.Debug:LogError (object)
Oculus.Haptics.HapticInstance:Initialize () (at ./Packages/com.meta.xr.sdk.haptics/Runtime/HapticInstance.cs:101)
Oculus.Haptics.HapticInstance:MakeClipFromJson (string) (at ./Packages/com.meta.xr.sdk.haptics/Runtime/HapticInstance.cs:127)
Oculus.Haptics.HapticClipPlayer:.ctor (Oculus.Haptics.HapticClip) (at ./Packages/com.meta.xr.sdk.haptics/Runtime/HapticClipPlayer.cs:77)
OculusHapticClipTest:Start () (at Assets/CombatProto/Impact CFX Haptic/OculusHapticClipTest.cs:14)

I can't find anything else that may be calling new HapticClipPlayer() anywhere else in the scene.

Any tips? Thanks