Zooming on character when Idle not working as Intended

Unity Engine
,
1

I wrote a co-routine that zooms in on the character when idle (no keys pressed) and zooms out to the original size when a the character starts moving (any key is pressed). When zooming in the lerp function I wrote works as expected, it zooms smoothly towards the character. However when It zooms out it doesn’t lerp but zooms out instantly and I can’t warp my mind around why it behaves like that.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CameraZoom : MonoBehaviour
{
    [Header("Configuration Parameters")]
    [SerializeField] private int zoomFactor;
    [SerializeField] private float zoomSpeed;

    [Header("Componenets")]
    [SerializeField] private PlayerController player;

    [Header("Variables")]
    private float originalSize;
    private float counter;


    private IEnumerator Zoom()
    {
        counter = 0f;

        while (true)
        {
            if (Input.anyKey == false)
            {
                counter += zoomSpeed;
                Camera.main.orthographicSize = Mathf.Lerp(originalSize, zoomFactor, counter);
                yield return null;
            }
            else
                break;
        }

        counter = 0f;        

        while(true)
        {
            if (Input.anyKey == true)
            {
                counter += zoomSpeed;
                Camera.main.orthographicSize = Mathf.Lerp(zoomFactor, originalSize, counter);
                yield return null;
            }
            else
                break;
        }
    }
  
    void Start()
    {
        originalSize = Camera.main.orthographicSize;
    }
    void Update()
    {
        StartCoroutine(Zoom());
    }
}
2

You forgot to reset counter to 0.

3

Fixed it, the same issue still occurs

4

Oh i didn’t notice this but you’re starting a new coroutine every frame:

void Update()
    {
        StartCoroutine(Zoom());
    }

This is just going to cause chaos.

5

Why is that and how do I fix it ??