so i have no problem at all i am just curious why my code is acting weird, first console log is already filtered before filter function, is this some kind of bug or something? can anyone explain it to me or redirect me to docs?

let users = JSON.parse(localStorage.getItem('users') || '[]');

    console.log(users)

    
    for(let user of users)
    {
      if(user.email === currentUser.email)
      {
        user.groups = user.groups.filter( (group:string) => group !== groupName )
        
      }
    }

    console.log(users);