Bootstrap$WebSocketListener throws NullPointerException in start up after updating EAP

Issue

• We see the following error upon start not previously seen before on prior EAP versions:

15:32:33,756 ERROR [io.undertow.servlet.request] (ServerService Thread Pool -- 78) UT015005: Error invoking method contextDestroyed on listener class io.undertow.websockets.jsr.Bootstrap$WebSocketListener: java.lang.NullPointerException
    at io.undertow.websocket@2.2.26.SP1-redhat-00001//io.undertow.websockets.jsr.Bootstrap$WebSocketListener.contextDestroyed(Bootstrap.java:133)
    at io.undertow.servlet@2.2.26.SP1-redhat-00001//io.undertow.servlet.core.ApplicationListeners.contextDestroyed(ApplicationListeners.java:202)
    at io.undertow.servlet@2.2.26.SP1-redhat-00001//io.undertow.servlet.core.DeploymentImpl.destroy(DeploymentImpl.java:291)
    at io.undertow.servlet@2.2.26.SP1-redhat-00001//io.undertow.servlet.core.DeploymentManagerImpl$4.call(DeploymentManagerImpl.java:683)
    at io.undertow.servlet@2.2.26.SP1-redhat-00001//io.undertow.servlet.core.DeploymentManagerImpl$4.call(DeploymentManagerImpl.java:673)
    at io.undertow.servlet@2.2.26.SP1-redhat-00001//io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42)
    at io.undertow.servlet@2.2.26.SP1-redhat-00001//io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
    at org.wildfly.extension.undertow@7.4.13.GA-redhat-00001//org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
    at org.wildfly.extension.undertow@7.4.13.GA-redhat-00001//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1555)
    at org.wildfly.extension.undertow@7.4.13.GA-redhat-00001//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1555)
    at org.wildfly.extension.undertow@7.4.13.GA-redhat-00001//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1555)
    at org.wildfly.extension.undertow@7.4.13.GA-redhat-00001//org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1555)
    at io.undertow.servlet@2.2.26.SP1-redhat-00001//io.undertow.servlet.core.DeploymentManagerImpl.undeploy(DeploymentManagerImpl.java:688)
    at org.wildfly.extension.undertow@7.4.13.GA-redhat-00001//org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:101)
    at org.wildfly.extension.undertow@7.4.13.GA-redhat-00001//org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:78)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at org.jboss.threads@2.4.0.Final-redhat-00001//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
    at org.jboss.threads@2.4.0.Final-redhat-00001//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1990)
    at org.jboss.threads@2.4.0.Final-redhat-00001//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
    at org.jboss.threads@2.4.0.Final-redhat-00001//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
    at java.base/java.lang.Thread.run(Thread.java:829)
    at org.jboss.threads@2.4.0.Final-redhat-00001//org.jboss.threads.JBossThread.run(JBossThread.java:513)