Injection does not occur into a normal scoped observer bean if @Observes method is private

If the observer method of a bean is private, and the bean which contains it has a scope (it's proxied), then injection into the bean does not occur.

For example, the injection points are null when the following observer is invoked:

@SessionScoped
public class SampleObserver implements Serializable {
@Inject SampleHelper helper;

private void observes(@Observes final SampleBean bean)

}

Prints:
Did injection occur? no