Remaining Weld references after WAR undeployement

I am not sure that this can be considered as issue, but when you run JBoss AS in JProfiler and try to deploy and undeploy simple Weld Web application (for example numberguess), you can find some referenced Weld classes in JProfiler even after performing GC. For example WeldBootstrap class, which has incoming references in following order:

... -> org.jboss.msc.service.ServiceControllerImpl -> org.jboss.msc.value.ImmediateValue -> org.jboss.as.weld.service.WeldService -> org.jboss.as.weld.WeldContainer -> org.jboss.weld.bootstrap.WeldBootstrap 

JProfiler snapshot is in attachement. In JProfiler you can filter org.jboss.weld.bootstrap classes and by right clicking you can show selection in Heap Walker, where you can also find references graph or tree.