Bug why my first person camera stutters/lag in editor ?

I made a first person controller with a camera and with the new input system. Sometimes when i go in playmode , the camera movement seems laggy or jerky. When i use a controller, the problem disappears but the sensitivity is very low (slow camera).

when i run the game in a build version , there is not lag at all but the mouse sensitivity is boosted up

do you have any ideas why this happens ? , I started to learn unity and C# a few weeks ago and I already feel like I'm going to give up

Code (CSharp):

1.     private void MoveCamera()
2.     {
3.         Vector2 MouseAxis = m_inputManager.GetMouseDelta();
4.  
5.         float MouseX = MouseAxis.x * CameraSensitivity * Time.deltaTime;
6.         float MouseY = MouseAxis.y * CameraSensitivity * Time.deltaTime;
7.  
8.         xRot -= MouseY;
9.         xRot = Mathf.Clamp(xRot, MinClamp, MaxClamp);
10.  
11.         m_camHolder.transform.localRotation = Quaternion.Euler(xRot, 0f, 0f);
12.         transform.Rotate(Vector3.up * MouseX);
13.     }