Bug Device Simulator bug

Hi.My unity version is 2021.1.28f1.I'm developing a mobile game. The problem is , when I use the device simulator, I cannot get the touch position as world position. On the logs it always shows (0,0,0).But when i use 2020.3.21f1 version it's working with any error.So am i doing something wrong or there is bug in 2021 versions for device simulators ? here is the script.

Code (CSharp):

1.  if(Touchscreen.current.primaryTouch.press.isPressed)
2.         {
3.             Vector2 touchPosition = Touchscreen.current.primaryTouch.position.ReadValue();
4.  
5.          
6.  
7.             Vector3 worldPosition = mainCamera.ScreenToWorldPoint(touchPosition);
8.  
9.             Debug.Log(worldPosition);
10.         }
11.