JSF WindowId: NPE in Weld HTTP BeanStore inhibits application access

Web session has been established, after very long time (>> session timeout) browser refresh, URL refresh leads to NPE in weld beanstore on access to SessionScoped deltaspike DefaultClientWindowConfig bean.

From that point on the only possibility to access the application is clean of session cookies.

Stacktrace:
2014-02-23 16:59:13,319 ERROR [io.undertow.request] (default task-36) Servlet request failed HttpServerExchange

{ GET /mssms2/faces/csms/groupManagement.xhtml}

: java.lang.NullPoi
nterException
at org.jboss.weld.context.beanstore.http.AbstractSessionBeanStore.getLockStore(AbstractSessionBeanStore.java:113) [weld-core-impl-2.1.0.CR1.jar:2013-09-26 16:53]
at org.jboss.weld.context.beanstore.AttributeBeanStore.lock(AttributeBeanStore.java:210) [weld-core-impl-2.1.0.CR1.jar:2013-09-26 16:53]
at org.jboss.weld.context.AbstractContext.get(AbstractContext.java:88) [weld-core-impl-2.1.0.CR1.jar:2013-09-26 16:53]
at org.jboss.weld.context.PassivatingContextWrapper$AbstractPassivatingContextWrapper.get(PassivatingContextWrapper.java:76) [weld-core-impl-2.1.0.CR1.jar:2013-09-26 16:
53]
at org.jboss.weld.bean.proxy.ContextBeanInstance.getInstance(ContextBeanInstance.java:98) [weld-core-impl-2.1.0.CR1.jar:2013-09-26 16:53]
at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:78) [weld-core-impl-2.1.0.CR1.jar:2013-09-26 16:53]
at org.apache.deltaspike.jsf.spi.scope.window.DefaultClientWindowConfig$Proxy$_$$_WeldClientProxy.getClientWindowRenderMode(Unknown Source) [deltaspike-jsf-module-api-0.
6-SNAPSHOT.jar:0.6-SNAPSHOT]
at org.apache.deltaspike.jsf.impl.scope.window.DefaultClientWindow.getWindowId(DefaultClientWindow.java:119) [deltaspike-jsf-module-impl-0.6-SNAPSHOT.jar:0.6-SNAPSHOT]
at org.apache.deltaspike.jsf.impl.scope.window.DefaultClientWindow$Proxy$_$$_WeldClientProxy.getWindowId(Unknown Source) [deltaspike-jsf-module-impl-0.6-SNAPSHOT.jar:0.6
-SNAPSHOT]
at org.apache.deltaspike.jsf.impl.listener.request.DeltaSpikeLifecycleWrapper.execute(DeltaSpikeLifecycleWrapper.java:78) [deltaspike-jsf-module-impl-0.6-SNAPSHOT.jar:0.
6-SNAPSHOT]