If a Customizer adds a management resource (e.g. the EJBSecurityCustomizer adds the jboss-ejb-policy security domain to the security subsystem), this management resource isn't visible in the Configurable-s log at boot. The Configurable-s log is printed after all Customizer-s finish, so I'd expect those management resources to be printed as well.
I don't know if this affects just logging and everything else is fine, or if this possibly affects the configuration process itself. So I figured I'd rather file a JIRA