Bug Jump is snappy when using rigidbody.AddForce(Vector3.Up, ForceMode.Impulse)

Hello! I'm making a skating game and with my skate controller I want the player to hold the jump to determine how much height they get from the jump, but when I add the force when the player stops hitting the space bar, the player gets height perfectly, but it almost teleports instead of making a jump.

This is the code, I just made a simple jump with RigidBody.AddForce(Vector3.Up * force, ForceMode.Impulse):

Code (CSharp):

1. public void Jump()
2.     {
3.         if (Input.GetButton("Jump"))
4.         {
5.             if (skateJumpPreassure < maxSkateJumpFoce) { skateJumpPreassure += Time.deltaTime * skateJumpMultiplier; }
6.             else { skateJumpPreassure = maxSkateJumpFoce; }
7.         }
8.         if (Input.GetButtonUp("Jump"))
9.         {
10.             skateJumpPreassure += skateJumpPreassure + minSkateJumpFoce;
11.             rb.velocity = new Vector3(rb.velocity.x, 0f, rb.velocity.z);
12.             newmanager2.PlaySound("Skate Jump");
13.  
14.             rb.AddForce(Vector3.up * skateJumpPreassure, ForceMode.Impulse);
15.             skateJumpPreassure = 0;
16.         }
17.     }