Scheduled events run only once and then they disappear

But do you have your plugin code to share, as being able to see what you’ve actually coded to set this up will be useful. If not the whole code, can you at list provide the section of code that generated the scheduled event?

Thanks.

Thank you, @dartiss!
I put the code on github:

Plugin main file: https://github.com/axettone/minestrone/blob/master/minestrone.php

function activate_minestrone() {
  require_once plugin_dir_path( __FILE__ ) . 'include/class-minestrone-activator.php';
  Minestrone_Activator::activate();
}

//...

register_activation_hook( __FILE__, 'activate_minestrone' );

Activation code: https://github.com/axettone/minestrone/blob/master/include/class-minestrone-activator.php

class Minestrone_Activator {
  public static function activate(){
    if(!wp_next_scheduled('refresh_minestrone_feeds')){
      wp_schedule_event(time(), 'hourly', 'refresh_minestrone_feeds');
      add_action('refresh_minestrone_feeds', array($this,'refresh_feeds'));
    }
  }
  public function refresh_feeds(){
  }
}

Actually the job is not even executed.