why is my instance not acting the same as the prefab?

the prefab is the ball falling, and the instance ball does not fall at all.
i've been trying to figure it out what it is, but i don't see any problems
can you guys help me out please?

https://imgur.com/a/jroAW3H

 

Do you have collision code that deletes the balls when they touch something? Are they deleting each other when they spawn quickly?

If not, pause the game and take a look at the spawned ball's inspector and make sure everything looks right.

 

They have on trigger, when they trigger with the box they get destroy
But sometimes the ball instance gets destroyed for some reason

 

What's the code for the trigger?

 

private void OnTriggerEnter2D(Collider2D collision)
{
Destroy(gameObject);
}

 

Is that on the box or the ball? That code will destroy the object when the trigger hits anything at all.

If your spawner just spawns just 1 ball, does it still have issues?

 

i acutally fixed this with physics 2d, now im getting other problem where prefab gets destroyed
and instance won't respawn