Communication problem between MATLAB and Unity using ROS Toolbox.

ROSToolbox is used to communicate between MATLAB(R2023b) and Unity(2022.3.10f1). However, when sending data from MATLAB to Unity, data is not sent for about two seconds from the start of communication.

When I check, it seems that the data is sent from MATLAB to Unity, but Unity side is not receiving the data.

Please let me know if you can solve this problem.

I am attaching the MATLAB and Unity code for your reference.

MATLAB code

%Create a ROS subscriber
poseSub = rossubscriber('/pose','geometry_msgs/PoseArray');

%Send multiple numerical data
arrayPub = rospublisher("/array_data", "std_msgs/Float32MultiArray");

for i = 1:3000
    
    poseArray = receive(poseSub);

    position = poseArray.Poses(1).Position;
  
    posx = poseArray.Poses(1).Position.X;
    posy = poseArray.Poses(1).Position.Y;
    posz = poseArray.Poses(1).Position.Z;

    controlSignal = posx*2;
    number = 0;

    numericData = controlSignal

   % Summarize data as an array
    dataArray = single([controlSignal, number]);

    % Create ROS message
    arrayMsg = rosmessage('std_msgs/Float32MultiArray');
    arrayMsg.Data = dataArray;

    % Send a message
    send(arrayPub, arrayMsg); 

end

Unity code (C#)

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Robotics.ROSTCPConnector;
using RosMessageTypes.Geometry;
using RosMessageTypes.Std;
using Unity.Robotics.ROSTCPConnector.ROSGeometry;

public class RosSubPub : MonoBehaviour
{
    //Publish related
    ROSConnection ros;
    public string topicName = "pose";

    //Sbscribe related
    public float num;
    public float input_num;

    // Start is called before the first frame update
    void Start()
    {   
        //Publish related
        ros = ROSConnection.GetOrCreateInstance();
        ros.RegisterPublisher<PoseArrayMsg>(topicName);     

        //Sbscribe related to receive multiple pieces of data
        ros.Subscribe<Float32MultiArrayMsg>("array_data",NumericDataReceived);//数値データ複数取得

    }

    //sbscribe related (receive multiple data)
    void NumericDataReceived(Float32MultiArrayMsg numericArrayMessage)
    {
        float[] receivedData = numericArrayMessage.data;

        if (receivedData != null && receivedData.Length >= 2)
        {
            num = receivedData[0];
            float receivedNumber = receivedData[1];
        }
    }       
}