Embeddable EJB3 sets up two copies of interceptor declared in ejb-jar.xml

My session beans have interceptors attached via:

<ejb-jar>
<assembly-descriptor>
<interceptor-binding>
<ejb-name>*</ejb-name>
<interceptor-class>org.jboss.seam.ejb.SeamInterceptor</interceptor-class>
</interceptor-binding>
</assembly-descriptor>
</ejb-jar>

And (only) when running in embeddable EJB3, they get two instances of SeamInterceptor.