Unity2D Wall Jump sends the player directly upwards sometimes.

Version: Unity 2019.4.14f1

I wanted wall jumping to feel good, so the player sticks to the wall for 0.1 seconds before they let go. However, now the player will sometimes ascend straight up the wall instead of jumping away from it, depending on the timing between pushing away from the wall and jumping off. Any idea why this might be?

I'm kind of new to Unity and C# in general so please be patient with me if it's something ridiculously obvious.

 public void WallKick(bool wallJump)
     {
         //Grab wall
         if (wallKickUpgrade1 && canGrab && !m_Grounded && !groundedLastUpdate && grabCooldown > 0)
         {
             //Player holding towards the wall and facing towards the wall
             if (((Input.GetKey(GameManager.GM.left) || Input.GetAxisRaw("Horizontal") < 0) && transform.localScale.x == -1f) || ((Input.GetKey(GameManager.GM.right) || Input.GetAxisRaw("Horizontal") > 0) && transform.localScale.x == 1f))
             {
                 //Sets the player to be grabbing
                 isGrabbing = true;
                 lastGrab = 0;
             }
             else
             {
                 isGrabbing = false;
             }
         }
         else if (lastGrab < 0.1f)
         {
             lastGrab += Time.deltaTime;
         }
         else
         {
             isGrabbing = false;
         }
         if (isGrabbing)
         {
             //Stops the player from moving while grabbing onto the wall
             m_Rigidbody2D.velocity = Vector2.zero;
         }
         if (isGrabbing)
         {
             //Wall Jump
             if (wallJump)
             {
                 //The player loses control for 0.2 seconds and is pushed away from the wall
                 isGrabbing = false;
                 playerCanInput = false;
                 StartCoroutine(WallJumpCounter());
                 grabCooldown--;
                 if (lastGrab > 0)
                 {
                     m_Rigidbody2D.velocity = new Vector2(transform.localScale.x * 10f, m_JumpForce);
                 }
                 else
                 {
                     m_Rigidbody2D.velocity = new Vector2(-transform.localScale.x * 10f, m_JumpForce);
                 }
             }
         }
     }
 
     IEnumerator WallJumpCounter()
     {
         yield return new WaitForSeconds(0.1f);
         playerCanInput = true;
     }