NPE when reading hibernate cache statistics

[standalone@localhost:9990 /] /deployment=*/subsystem=jpa:read-resource(recursive=true,include-runtime=true)
{
    "outcome" => "failed",
    "result" => [{
        "address" => [
            ("deployment" => "jboss-as-kitchensink-jsp.war"),
            ("subsystem" => "jpa")
        ],
        "outcome" => "failed",
        "rolled-back" => true
    }],
    "rolled-back" => true
}

13:31:14,221 ERROR [org.jboss.as.controller.management-operation] (management-handler-thread - 7) JBAS014612: Operation ("read-attribute") failed - address: ([
    ("deployment" => "jboss-as-kitchensink-jsp.war"),
    ("subsystem" => "jpa"),
    ("hibernate-persistence-unit" => "jboss-as-kitchensink-jsp.war#primary"),
    ("entity-cache" => "org.jboss.as.quickstarts.kitchensinkjsp.model.Member")
]): java.lang.NullPointerException
	at org.jboss.as.jpa.hibernate4.management.HibernateEntityCacheStatistics$6.invoke(HibernateEntityCacheStatistics.java:136)
	at org.jboss.as.jpa.hibernate4.management.HibernateAbstractStatistics.getValue(HibernateAbstractStatistics.java:99)
	at org.jboss.as.jpa.management.ManagementResourceDefinition$1.handle(ManagementResourceDefinition.java:118)
	at org.jboss.as.jpa.management.ManagementResourceDefinition$AbstractMetricsHandler.executeRuntimeStep(ManagementResourceDefinition.java:256)