my movement doesn't work after adding "follow player" script to camera

this is my follow player script public Transform camera; public Transform player; bool cameraMovCheck;

 void Start () {
     cameraMovCheck = GetComponent<movement>().cameraMovCheck;

 }
 
 // Update is called once per frame
 void Update () {
     cameraMovCheck = GetComponent<movement>().cameraMovCheck;
     if (cameraMovCheck == true)
     {
         camera.position += new Vector3(0, 0.5f,0);
         
     }
 }

in playerMovement script ,all i did was used "onBecomeVisible() and onBecomeInvible" function which sends a bool value to followPlayer script.playerMovement works fine if i un check followPlayer script.