WeldPortableExtensionProcessor does not clear registered Extensions on undeploy()

20:11:08,590 INFO  [org.wildfly.clustering.server] (DistributedSingletonService - 1) WFLYCLSV0003: node1 elected as the singleton provider of the jboss.deployment.unit."clusterbench-ee7-singleton-jbossall.ear".installer service
20:11:08,594 INFO  [org.wildfly.clustering.server] (DistributedSingletonService - 1) WFLYCLSV0001: This node will now operate as the singleton provider of the jboss.deployment.unit."clusterbench-ee7-singleton-jbossall.ear".installer service
20:11:08,603 INFO  [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (thread-2) ISPN000094: Received new cluster view for channel server: [node1|4] (1) [node1]
...
20:11:08,794 INFO  [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 26) WFLYCLINF0002: Started clusterbench-ee7-singleton-jbossall.ear/clusterbench-ee7-ejb.jar cache from ejb container
20:11:08,837 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-7) MSC000001: Failed to start service jboss.deployment.unit."clusterbench-ee7-singleton-jbossall.ear".WeldStartService: org.jboss.msc.service.StartException in service jboss.deployment.unit."clusterbench-ee7-singleton-jbossall.ear".WeldStartService: Failed to start service
	at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1978)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type Validator with qualifiers @Default
  at injection point [UnbackedAnnotatedField] @Inject private org.hibernate.validator.internal.cdi.interceptor.ValidationInterceptor.validator
  at org.hibernate.validator.internal.cdi.interceptor.ValidationInterceptor.validator(ValidationInterceptor.java:0)

	at org.jboss.weld.bootstrap.Validator.validateInjectionPointForDeploymentProblems(Validator.java:362)
	at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:284)
	at org.jboss.weld.bootstrap.Validator.validateInterceptor(Validator.java:539)
	at org.jboss.weld.bootstrap.ConcurrentValidator$2.doWork(ConcurrentValidator.java:78)
	at org.jboss.weld.bootstrap.ConcurrentValidator$2.doWork(ConcurrentValidator.java:76)
	at org.jboss.weld.executor.IterativeWorkerTaskFactory$1.call(IterativeWorkerTaskFactory.java:62)
	at org.jboss.weld.executor.IterativeWorkerTaskFactory$1.call(IterativeWorkerTaskFactory.java:55)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
	at org.jboss.threads.JBossThread.run(JBossThread.java:320)