Moving components up and down in a container produced stacktrace

Got the following stacktrace when moving components up in a container which before I deleted a component in. This was in Firefox. Could not reproduce however.

[INFO] [talledLocalContainer] 15.04.2015 11:30:28 WARN [org.hippoecm.hst.pagecomposer.jaxrs.services.MountResource.getPageModelRepresentation():123] Failed to retrieve page model.
[INFO] [talledLocalContainer] java.lang.RuntimeException: Cannot find component configuration for root id 'b038dcbe-5248-45af-8738-86e4029c64e7'
[INFO] [talledLocalContainer] at org.hippoecm.hst.pagecomposer.jaxrs.model.PageModelRepresentation.represent(PageModelRepresentation.java:49)
[INFO] [talledLocalContainer] at org.hippoecm.hst.pagecomposer.jaxrs.services.MountResource.getPageModelRepresentation(MountResource.java:116)
[INFO] [talledLocalContainer] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[INFO] [talledLocalContainer] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[INFO] [talledLocalContainer] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[INFO] [talledLocalContainer] at java.lang.reflect.Method.invoke(Method.java:497)
[INFO] [talledLocalContainer] at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:181)
[INFO] [talledLocalContainer] at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:97)
[INFO] [talledLocalContainer] at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:200)
[INFO] [talledLocalContainer] at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:99)
[INFO] [talledLocalContainer] at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:59)
[INFO] [talledLocalContainer] at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:96)
[INFO] [talledLocalContainer] at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:307)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:251)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:223)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:197)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:149)
[INFO] [talledLocalContainer] at org.hippoecm.hst.jaxrs.cxf.CXFJaxrsService.invoke(CXFJaxrsService.java:147)
[INFO] [talledLocalContainer] at org.hippoecm.hst.pagecomposer.jaxrs.cxf.CXFJaxrsHstConfigService.invoke(CXFJaxrsHstConfigService.java:155)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.JaxrsRestServiceValve.invoke(JaxrsRestServiceValve.java:38)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.GenericResponseHeadersValve.invoke(GenericResponseHeadersValve.java:83)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.CmsSecurityValve.invoke(CmsSecurityValve.java:123)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.CmsHostRestRequestContextValve.invoke(CmsHostRestRequestContextValve.java:48)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.InitializationValve.invoke(InitializationValve.java:50)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline.invokeValves(HstSitePipeline.java:170)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline.invoke(HstSitePipeline.java:153)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstRequestProcessorImpl.processRequest(HstRequestProcessorImpl.java:79)
[INFO] [talledLocalContainer] at org.hippoecm.hst.container.HstDelegateeFilterBean.doFilter(HstDelegateeFilterBean.java:397)
[INFO] [talledLocalContainer] at org.hippoecm.hst.container.DelegatingFilter.doFilter(DelegatingFilter.java:84)
[INFO] [talledLocalContainer] at org.hippoecm.hst.container.HstFilter.doFilter(HstFilter.java:51)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
[INFO] [talledLocalContainer] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.hippoecm.hst.container.XSSUrlFilter.doFilter(XSSUrlFilter.java:49)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
[INFO] [talledLocalContainer] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
[INFO] [talledLocalContainer] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
[INFO] [talledLocalContainer] at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
[INFO] [talledLocalContainer] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
[INFO] [talledLocalContainer] at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
[INFO] [talledLocalContainer] at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
[INFO] [talledLocalContainer] at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
[INFO] [talledLocalContainer] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1517)
[INFO] [talledLocalContainer] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1474)
[INFO] [talledLocalContainer] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[INFO] [talledLocalContainer] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[INFO] [talledLocalContainer] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
[INFO] [talledLocalContainer] at java.lang.Thread.run(Thread.java:745)