Ordering of lifecycle event observers is not working

In spec 2.0 EDR in chapter "11.5. Container lifecycle events":

The notification order for observer methods within extensions follows the same ordering rule as defined in Observer ordering for non-extension observers. The priority of an observer method may be declared using the @Priority annotation.

Reproducible by TCK test org.jboss.cdi.tck.tests.extensions.observer.priority.ExtensionObserverOrderingTest