Help: Camera script sets Camera rotation always to World Rotation

I have a big Problem with my Mouse Look script.

I have set the PlayerController to rotate with the camera and the camera to follow the PlayerController. They have the same Parent.

Now if I start the game and the Parent is turned around the y axis 270° the camera turns itself back to the world rotation and in the camera transform tab its then set to 90°.... if I rotate the camera in the transform tab it goes back to the world rotation too....

I found the part in my code which causes this problem but I dont know how to fix it... I mark the part in my code.

please help.

 var playerBody : GameObject;
 var cameraOffset = 0.7;
 
 var lookSensitivity : float = 4;
 @HideInInspector
 var yRotation : float;
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 var xRotation : float;
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 var currentYRotation : float;
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 var currentXRotation : float;
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 var yRotationV : float;
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 var xRotationV : float;
 
 var lookSmoothDamp : float = 0.08;
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 var currentAimRacio : float = 1;
 
 private var headbobbing : Headbobbing_harry;
 
 function Awake()
 {
     playerBody = GameObject.Find("Player Body");
     headbobbing = GetComponent(Headbobbing_harry);
 }
      
 function LateUpdate()
 {
     yRotation += Input.GetAxis("Mouse X") * lookSensitivity * currentAimRacio;
     xRotation -= Input.GetAxis("Mouse Y") * lookSensitivity * currentAimRacio;
 
     xRotation = Mathf.Clamp(xRotation, -90, 90);
     
     currentYRotation = Mathf.SmoothDamp(currentYRotation, yRotation, yRotationV, lookSmoothDamp);
     currentXRotation = Mathf.SmoothDamp(currentXRotation, xRotation, xRotationV, lookSmoothDamp);
 
 
 // this line sets the start rotation always to the world rotation....
     transform.rotation = Quaternion.Euler(currentXRotation, currentYRotation , 0);
 
 
     transform.position = playerBody.transform.position + Vector3(0,cameraOffset,0);
 }