Respawning gameobject

 private Rigidbody2D RB2D;

 public float fallDelay;             // The time before platform falls
 public float RespawnDelay;          // The time before platform respawns
 public Transform Spawnpoint;        // Objects spawnpoint


 void Start()
 {
     RB2D = GetComponent<Rigidbody2D>();
 }

 void OnCollisionEnter2D(Collision2D col)
 {
     if (col.collider.name == ("Player"))
     {
         StartCoroutine(Fall());
     }
 }

 IEnumerator Fall()
 {        
     yield return new WaitForSeconds(fallDelay);            // Wait platform to fall
     RB2D.isKinematic = false;                              // Not kinematic so it falls
     GetComponent<Collider2D>().isTrigger = true;           // Is trigger now so won't collide
     Destroy(RB2D.gameObject, 12);                          // Destroy object after set time
     yield return new WaitForSeconds(RespawnDelay);         // Wait respawn delay
     RB2D.isKinematic = true;                               // Kinematic again so it won't fall
     GetComponent<Collider2D>().isTrigger = false;          // Is trigger again so collions apply
     Instantiate(RB2D, Spawnpoint.position, Spawnpoint.rotation);// Instantiate to the Spawnpoint
     yield return 0;
 }

What it does: There is platform on scene that when player is colliding with it, it soon falls and after set time it respawns to the spawnpoint and then is destroyed after player again collides with it.

It currently works quite nice BUT when it creates new instances, it makes clones of itself so finaly there is like "gameobject(clonecloneclone...)". Just looks stupid and there surely is better way.

Also, now I must wait before destroying the gameobject or else I can't spawn it anymore because it doesn't exists.

So, how could I make the code better? I read about disabling it only and not destroying it but couldn't get it to work...

While I copied parts of it from web, I made it also suit better my needs, and since I'm still quite new to coding I could had surely made it better. Any thoughts of it overall all welcome.