Problem with redirect-> to

Hello,
sorry for my English,
I have a strange problem, redirection works fine when I call it from a method, but when I call it from a function it doesn't work.

Example:

PHP Code:

   //Example function to redirect
    public function _redirect_user(){
        return redirect()->to(site_url('proyecto/index'));
    }
    
    //This does not work, it does not throw an error, it is just as if the process ended.
    public function my_method_a()    
    {
        $this->_redirect_user();
    }
    
    //This works fine.
    public function my_method_b()    
    {
        return redirect()->to(site_url('proyecto/index'));
    }