Unity Prefab GameObject Instantly Dissapearing on Instantiation,Unity Prefab GameObject Dissapearing after Instantiation

Hey everyone, I am a beginner in Unity, but a fairly experienced coder. I'm having an issue with the engine.

I am working on a game where I would like the player to be able to slide across a screen and "shoot: a projectile. After a lot of research, I understand that I can do this using the "Instantiate" function. However, when I do call this method, objects appear on screen for half a second before dissapearing. As a test, I call this method in the Start() and another time when the player pressed a button that calls pressFire(). Both methods don't work, the prefab instantly dissapears.

There is a script attached to the prefab, but there's nothing other than "anchoredPosition += new Vecotr2(1,1) * Time.deltaTime;" in the Update() method.

I'm using a UI based system, where all my GameObjects are essentially Images. I also understand that using a RigidBody would make my life much easier, however I would like to see if I could finish the game by manipulating the RectTransform component.

 public class TouchScript : MonoBehaviour
 {
  
     private bool firePressed = false;
     public GameObject prefabProjectile;
     public Transform panel;
     private GameObject tempProj;
     
     // Update is called once per frame
     void Start()
     {
         tempProj = (GameObject) Instantiate(prefabProjectile, new Vector2(200f,200f), Quaternion.identity);
         tempProj.transform.SetParent(panel.transform,false);
     }
 
     void Update()
     {
         if(Input.touchCount > 0)
         {
             if(firePressed)
             {
                 fireRect.anchoredPosition = currentPos;
             }
            
         }
         if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended)
         {
             if(firePressed)
             {
                 createProjectile(fireProjectile);
             }
             pressFire(false);
         }
     }
 
     public void pressFire(bool b)
     {
         firePressed = b;
         if(!b)
         {
             fireRect.anchoredPosition = fireOrignalPosition;
             fireRect.GetComponent<TrailRenderer>().Clear();
         }
     }
 
     public void createProjectile(Sprite s)
     {
         GameObject proj = (GameObject) Instantiate(prefabProjectile, new Vector2(0f,0f), Quaternion.identity);
         proj.GetComponent<TouchPlayerProjectile>().setSprite(s);
         proj.transform.SetParent(panel.transform,false);
     }
 }

Could anyone point out where I may have made a mistake or a better way of implementing my code?