How to move a child object freely (within), when parented to a new parent Object?

I am creating a moving platform a player can stand on, the platform is simple, just moves left and right. so what i have done is simply move the player Object and attach it to the platform Object whenever OntriggerEnter2D, and on Exit it just simply gets removed as a child of the platform, simple enough.

The problem, however, is when once player becomes the child of the platform it is nearly imposible to move, i can move just incredibly slow (i have the platform set to trigger and rigid to kinematic) where have i gone wrong and why cant i move normally? Code below if needed, any help is greatly appreciated.

//This is isometric Player movement strait from Unity sources

void FixedUpdate()
{
    Vector2 currentPos = rbody.position;
    float horizontalInput = Input.GetAxis("Horizontal"); //* movementSpeed;
    float verticalInput = Input.GetAxis("Vertical"); // * movementSpeed;
    Vector2 inputVector = new Vector2(horizontalInput, verticalInput);
    inputVector = Vector2.ClampMagnitude(inputVector, 1);
    Vector2 movement = inputVector * movementSpeed;
    Vector2 newPos = currentPos + movement * Time.fixedDeltaTime;
    isoRenderer.SetDirection(movement);
    rbody.MovePosition(newPos);
}

//this is the moving Platform movement

public class Patroll: StateMachineBehaviour {

    GameObject NPC;
    GameObject[] waypoints;
    int currentWP;

    void Awake() {
        waypoints = GameObject.FindGameObjectsWithTag("WayPoint");
    }

    override public void OnStateEnter(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
        NPC = animator.gameObject;
        currentWP = 0;
    }

    override public void OnStateUpdate(Animator animator, AnimatorStateInfo stateInfo, int layerIndex) {
        if (waypoints.Length == 0) return;
        if (Vector2.Distance(waypoints[currentWP].transform.position, NPC.transform.position) < 0.2f) {
            currentWP++;
            if (currentWP >= waypoints.Length) {
                currentWP = 0;
            }
        }

        NPC.transform.localPosition = Vector2.MoveTowards(NPC.transform.position, waypoints[currentWP].transform.position, Time.deltaTime * 1.0f);
    }
}

//and this is the interaction is being handled

public class MovingObject: MonoBehaviour
{
    private void OnTriggerEnter2D(Collider2D other) {
        if (other.transform.gameObject.tag == "Player") {
            other.transform.parent = transform;

            //other.transform.parent.SetParent(transform);
        }

    }
    
    private void OnTriggerExit2D(Collider2D other) {

        if (other.transform.gameObject.tag == "Player")

        {
            other.transform.parent = null;
        }

    }
}