Global D8 container is not available when rebuilding the container

[kevin-dutra]

Typically when the container is being rebuilt, it's within the context of a normal Drupal page request. At that point, Drupal has already booted and the global container is available, leaving services available for use in certain other steps, like defining events that your EventSubscriber subscribes to. Unfortunately, Drush's DrupalKernel will immediately rebuild the container without having the global container initialized with the existing one.

The particular use case we've run into that is causing us headaches is the Rules module (though there may be others). It utilizes the State API to determine which events one of its EventSubscribers should subscribe to. If the global container is not yet available, then it can't get the state service to subscribe to the correct events and then the rules you expect to trigger never do anything.