How to prevent animation sync on duplicated object

I have an object that has an animator, inside has one simple animation, move up and down in loop and other animation which is IDLE, no movement at all.

Now I want to have a lots of this same object jumping up and down, but each of them will make transition from idle to movement at different time so i have this script attachet to them

public float AnimationStartOffset;
public Animator animator;

private float next_start_floating;
private bool isStart = false;

// Use this for initialization
void Start () {
    next_start_floating = Time.time + AnimationStartOffset;

// Update is called once per frame
void Update () {
    if(Time.time > next_start_floating && !isStart)
        animator.SetBool("IsJumping", true);
        isStart = true;


I set the offset value differently to each object, but the animation of some objects are always start at same time, I also try to the the transition to no exit time, and using StartCoroutine, but the result is same.

Please help

for anyone still needing this:

public class PlayFromOffset: MonoBehaviour
    // Start is called before the first frame update
    private Animator anim;
    public float frameOffset = 10;
    public string stateName = "Walk_RM";
    private const int ALL_LAYERS = 0;

    void Start()
        anim = GetComponent<Animator>();
        anim.Play(stateName, ALL_LAYERS, frameOffset);


Make sure your gameobject has an animator component on it… and set the stateName to your named animation from your controller.