Animating Offset on a Quad is causing stretching issue only with iOS devices - Using Wrap Mode: Repeat

I added a 3D Object > Quad and added a graphic on it with the Wrap Mode set to Repeat. I'm animating the Offset to scroll the repeating image for a parallax effect. Everything is working perfectly with in Editor and Android devices. On iOS devices, the image shows fine and then stretches as the offset is changing. I'm attaching 2 screen shots of the image import settings - Quad settings, and the issue on the iPhone. Below is my code:

 public float scrollSpeed = 0.05f;
     private Vector2 savedOffset;
     Rigidbody2D player;
 
     void Start () {
         GameObject player_go = GameObject.FindGameObjectWithTag("Player");
 
         if (player_go == null)
         {
             //Debug.LogError("Couldn't find an object with tag 'Player'");
             return;
         }
 
         player = player_go.GetComponent<Rigidbody2D>();
 
         savedOffset = GetComponent<Renderer>().sharedMaterial.GetTextureOffset("_MainTex");
     }
 
     void FixedUpdate()
     {
         if(player.GetComponent<BirdMovement>().dead)
         {
             return;
         }
         float vel = Time.fixedTime * scrollSpeed;
         
         float y = Mathf.Repeat(vel, 1);
         Vector2 offset = new Vector2(y, savedOffset.x%1);
 
         offset.x = (float) System.Math.Round (offset.x, 3); //Mathf.Round (offset.x * 10) / 10;
 
         Debug.Log ("Offset:" + offset.x);
         if (offset.x > 1) {
             offset.x = 0;
         }
         GetComponent<Renderer>().sharedMaterial.SetTextureOffset("_MainTex", offset);
     }
 
     void OnDisable()
     {
         GetComponent<Renderer>().sharedMaterial.SetTextureOffset("_MainTex", savedOffset);
     }