The code after WaitForSeconds is not working

Hello everyone. I'm making a runner game, so I need a powerup that makes you jump higher for 3 seconds. I've made a sprite with a box collider trigger that starts the DoubleJump coroutine. There's the code of the script that's attached to the sprite:

     private void OnTriggerEnter(Collider other)
     {
         Destroy(GetComponent<Transform>().gameObject);
         if (other.CompareTag("Player")) {
             StartCoroutine(DoubleJump(other));
         }
     }
 
     IEnumerator DoubleJump(Collider other)
     {
         var obj = other.GetComponent<RigidbodyFirstPersonController>().movementSettings;
         obj.JumpForce *= 2;
         Debug.Log("before return");
         yield return new WaitForSeconds(1);
         Debug.Log("after return");
         obj.JumpForce /= 2;
     }

After colliding with the sprite it disappears, jump force is doubling, "before return" shows in a log but nothing really happens after that, so the code after "yield return new WaitForSeconds(1);" is not evaluating. Can you please tell me why and fix the problem? Thank you.