ConcurrentModificationException releasing JSF factories

5:04:37,876 ERROR [io.undertow.servlet.request] (MSC service thread 1-4) UT015005: Error invoking method contextDestroyed on listener class com.sun.faces.config.ConfigureListener: java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926) [rt.jar:1.7.0_45]
        at java.util.HashMap$ValueIterator.next(HashMap.java:954) [rt.jar:1.7.0_45]
        at javax.faces.FactoryFinder.releaseFactories(FactoryFinder.java:440) [jboss-jsf-api_2.2_spec-2.2.4.jar:2.2.4]
        at com.sun.faces.config.ConfigManager.releaseFactories(ConfigManager.java:808) [jsf-impl-2.2.4-jbossorg-1.jar:]
        at com.sun.faces.config.ConfigManager.destroy(ConfigManager.java:474) [jsf-impl-2.2.4-jbossorg-1.jar:]
        at com.sun.faces.config.ConfigureListener.contextDestroyed(ConfigureListener.java:329) [jsf-impl-2.2.4-jbossorg-1.jar:]
        at io.undertow.servlet.core.ApplicationListeners.contextDestroyed(ApplicationListeners.java:185) [undertow-servlet-1.0.0.Beta27.jar:1.0.0.Beta27]
        at io.undertow.servlet.core.DeploymentImpl.destroy(DeploymentImpl.java:216) [undertow-servlet-1.0.0.Beta27.jar:1.0.0.Beta27]
        at io.undertow.servlet.core.DeploymentManagerImpl.undeploy(DeploymentManagerImpl.java:523) [undertow-servlet-1.0.0.Beta27.jar:1.0.0.Beta27]
        at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.stopContext(UndertowDeploymentService.java:117)
        at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.stop(UndertowDeploymentService.java:100)
        at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:2056)
        at org.jboss.msc.service.ServiceControllerImpl$StopTask.run(ServiceControllerImpl.java:2017)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_45]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_45]
        at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]