Problem with modifying scrollPosition on android

Hi. I made a simple credits scene showing a scroll view with labels in it where in the update function the scrollPosition variable is modified so it scrolls down. This works on PC, but on my android device nothing happens.

The update function where the scollPosition.y is modified

 void Update()
     {
         scrollPosition.y += Time.deltaTime*scrollSpeed;
     }

And the OnGUI

 void OnGUI() 
     {
         GUI.BeginGroup(new Rect(0,0,Screen.width,Screen.height));  //note the 250 width and 305 height compared to the scrollview size
         
         scrollPosition = GUILayout.BeginScrollView(scrollPosition, false, false, GUIStyle.none, GUIStyle.none, GUILayout.Width(Screen.width), GUILayout.Height(Screen.height));
     
         GUILayout.Label("\n\n\nCredits", largeLabel);
         
         GUILayout.EndScrollView();
         
         GUI.EndGroup();
     }