hand_data Hands[MLHandTrackingHandType_Count] = {}; // position and rotation transform
        MLHandle hand_tracker_ = ML_INVALID_HANDLE;
        MLHandTrackingStaticData hand_static_data_ = {};
        MLHandTrackingData HandData = {};

inline void InitializePerception()
{
        MLPerceptionSettings perception_settings = {};
        UNWRAP_MLRESULT_FATAL(MLPerceptionInitSettings(&perception_settings));
        UNWRAP_MLRESULT_FATAL(MLPerceptionStartup(&perception_settings));
}

 inline void HandTrackInit(void)
        {
            MLHandTrackingStaticDataInit(&hand_static_data_);
            UNWRAP_MLRESULT(MLHandTrackingCreate(&hand_tracker_));
            UNWRAP_MLRESULT_FATAL(MLHandTrackingGetStaticData(hand_tracker_, &hand_static_data_));
        }

  void OnHandUpdate(void)
    {
        MLHandTrackingData InternalData;
        MLHandTrackingDataInit(&InternalData);
        MLSnapshot *snapshot = nullptr;
        MLPerceptionGetSnapshot(&snapshot);

        ASSERT_MLRESULT(MLHandTrackingGetData(hand_tracker_, &InternalData));
        UpdateHand(snapshot, InternalData, MLHandTrackingHandType_Left);
        UpdateHand(snapshot, InternalData, MLHandTrackingHandType_Right);
        HandData = InternalData;
        MLPerceptionReleaseSnapshot(snapshot);
    }

 void UpdateHand(MLSnapshot *snapshot, const MLHandTrackingData &_HandData, MLHandTrackingHandType hand_type)
    {
        const MLHandTrackingHandState &hand_state = _HandData.hand_state[hand_type];
        bool hand_valid = hand_state.hand_confidence > 0;
        if (hand_valid)
        {
            for (uint8_t i = 0; i < MLHandTrackingStaticData_MaxKeyPoints; ++i)
            {
                if (hand_state.keypoints_mask[i])
                {
                    MLTransform keypoint_transform;
                    // This call is the issue.
                    UNWRAP_MLRESULT(MLSnapshotGetTransform(snapshot, &GetHandFrameId(hand_type, i), &keypoint_transform));
                    Hands[hand_type].HandTransform[i] = keypoint_transform;
                }
            }
        }
     }