How to stop character controller from accelerating/sliding

I'm using the default Character Controller and for some reason, it keeps on going for a second even after I have stopped moving. Preventing this is the exact reason I switched from a physics controller to the character controller after seeing the Brackeys video about it (same as shown in the Brackeys video, in which the controller does not accelerate/slide).

Here is the script I'm using to move the controller.

 public float movementSpeed = 5f, speedH = 2f, yaw;
 
     private void Start() {
         controller = GetComponent<CharacterController>(); 
     }
 
     private void Update() {
         float x = Input.GetAxis("Horizontal");
         float z = Input.GetAxis("Vertical");
 
         Vector3 move = transform.right * x + transform.forward * z;
 
         controller.Move(move * movementSpeed * Time.deltaTime); 
 
         yaw += speedH * Input.GetAxis("Mouse X");
 
         transform.eulerAngles = new Vector3(0.0f, yaw, 0.0f);
     }

Just to clarify, I'm not using any rigid body components or additional colliders on the player object.