Unity Multiplayer Server's heartbeat vanishes about gsdk HOT 8 CLOSED

public class PlayFabMultiplayerAgentView : MonoBehaviour
{
    /// <summary>
    /// Static reference to the current active instance of the PlayFabMultiplayerAgentView.
    /// </summary>
    public static PlayFabMultiplayerAgentView current;
    private float _timer;
    /// <summary>
    /// Awake constructor
    /// </summary>
    private void Awake()
    {
        Debug.Log($"{Time.fixedTime} PlayFabMultiplayerAgentView awake ");
        // Check if the static instance already contains a refernce:
        if (current)
        {
            // Destroy this instance since we only ever need one PlayFabMultiplayerAgentView
            Destroy(gameObject);
            return;
        }
        else
        {
            // Need to keep this game object alive through scene changes.
            DontDestroyOnLoad(this);
            current = this;
        }
    }

    /// <summary>
    /// Called when gameobject is destroyed
    /// </summary>
    private void OnDestroy()
    {
        Debug.Log($"{Time.fixedTime} PlayFabMultiplayerAgentView destroyed ");
    }
}