EventTrigger.OnUpdateSelected not working on mobile

as the titles says its not working on mobile but works on pc. unity answers is dead and have been waiting on a answer for 2 weeks. why does this not work on mobile. what im trying to achieve is when you press and hold on a button it shrinks or grows an object. it works fine on pc. the pressed and released functions work just now the grow/shrink on mobile

Code (JavaScript):

1. function Shrink(){
2.     if(obj != null && pressed == true)
3.     obj.transform.localScale -= Vector3.one * speed * Time.deltaTime;
4. }
5. function Grow(){
6.     if(obj != null && pressed == true)
7.     obj.transform.localScale += Vector3.one * speed * Time.deltaTime;
8. }
9.  
10. function Pressed(){
11.     pressed = true;
12. }
13. function Released(){
14.     pressed = false;
15. }

 

also why is unity answers dead?

 

which "mobile"? they all work differently...

 

android