Bouncing square stops moving diagonally

In my current weekly project, I've got a square that bounces moves diagonally across the screen after a certain interval. During every game, at least one of these squares stops moving diagonally and instead only moves on the X or Y axis.

• I have a physics component that has bounciness at 1 and friction at 0

• The object has a rigidbody2d with gravity set to 0 and fixed angle turned on, no other changes.

• I've attached the script I've been trying to use most recently to no avail

• I've attempted to use Physics.Reflect but that doesn't seem to fix the issue as well.

Note, the issue normally happens when it is pinned between one object and a wall.

 public class BouncerObj : MonoBehaviour {
 
     Rigidbody2D rb2d;
 
     void Start()
     {
         rb2d = transform.GetComponent<Rigidbody2D>();
         rb2d.fixedAngle = true;
     }
 
     void OnCollisionEnter2D(Collision2D other)
     {
         if ((other.gameObject.tag == "Player" || other.gameObject.tag == "Enemy") && !gameObject.GetComponent<Collider2D>().isTrigger)
         {
             gameObject.GetComponent<Collider2D>().isTrigger = true;
         }
         else if ((other.gameObject.tag == "Friendly" || other.gameObject.tag == "Wall" || other.gameObject.tag == "Bouncer"))
         {
             Vector2 dir = new Vector2(-transform.position.x,-transform.position.y);
             GetComponent<Rigidbody2D>().velocity = dir;
         }
     }
 
     void TriggerChange()
     {
             gameObject.GetComponent<Collider2D>().isTrigger = true;
     }
 
     void OnTriggerEnter2D(Collider2D other)
     {
         if (other.gameObject.tag == "Player")
         {
             if (MovePlayer.invincible == true)
             { }
             else
             {
                 Scores.fShot += 5;
                 MovePlayer.invincible = true;
             }
         }
         else if ((other.gameObject.tag == "Friendly" || other.gameObject.tag == "Wall" || other.gameObject.tag == "Bouncer") && gameObject.GetComponent<Collider2D>().isTrigger)
         {
             gameObject.GetComponent<Collider2D>().isTrigger = false;
             Invoke("TriggerChange", 0.03f);
         }
     }
 }