Strange Bug or Code Error with footsteps?

I am currently working on a first person game, and I searched how to do footsteps and followed a tutorial, but the footsteps currently plays only when I walk down slopes and at random points.

Here is the code for the footsteps

Footsteps.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.Audio;
 
 public class Footsteps : MonoBehaviour
 {
 
     private AudioSource sound;
 
     public AudioClip[] soundlist;
 
     private CharacterController character;
 
     public float volume_Min, volume_Max;
     public float stepDist;
 
     private float dist;
 
     void Awake()
     {
         sound = GetComponent<AudioSource>();
 
         character = GetComponentInParent<CharacterController>();
     }
 
     void Update()
     {
         PlaySound();
     }
 
     void PlaySound()
     {
         if (character.velocity.magnitude > 0f)
         {
             dist += Time.deltaTime;
 
             if(dist >= stepDist)
             {
                 sound.volume = Random.Range(volume_Min, volume_Max);
                 sound.clip = soundlist[Random.Range(0, soundlist.Length)];
                 sound.Play();
 
                 dist = 0f;
             } 
         }
     }
 }