From time to time I get the following exception when Spring Boot restarts.
What could be the reason?
java.lang.IllegalStateException: Can't move a node from one state tree to another
at com.vaadin.flow.internal.StateNode.doSetTree(StateNode.java:657) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.internal.StateNode.lambda$setTree$3(StateNode.java:364) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.internal.StateNode.visitNodeTree(StateNode.java:616) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.internal.StateNode.setTree(StateNode.java:364) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.internal.StateNode.setParent(StateNode.java:264) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.internal.nodefeature.NodeFeature.attachPotentialChild(NodeFeature.java:78) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.internal.nodefeature.StateNodeNodeList.add(StateNodeNodeList.java:53) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.internal.nodefeature.ElementChildrenList.add(ElementChildrenList.java:42) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.dom.impl.AbstractNodeStateProvider.insertChild(AbstractNodeStateProvider.java:102) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.dom.Node.insertChild(Node.java:250) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.dom.Node.appendChild(Node.java:141) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.component.internal.UIInternals.showRouteTarget(UIInternals.java:684) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.router.internal.AbstractNavigationStateRenderer.handle(AbstractNavigationStateRenderer.java:221) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.router.Router.handleNavigation(Router.java:219) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.router.Router.navigate(Router.java:190) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.router.Router.initializeUI(Router.java:92) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.server.BootstrapHandler.createAndInitUI(BootstrapHandler.java:1117) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.server.BootstrapHandler.synchronizedHandleRequest(BootstrapHandler.java:396) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:40) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.server.VaadinService.handleRequest(VaadinService.java:1507) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.server.VaadinServlet.service(VaadinServlet.java:242) ~[flow-server-1.4.4.jar:1.4.4]
at com.vaadin.flow.spring.SpringServlet.service(SpringServlet.java:81) ~[vaadin-spring-11.0.0.jar:na]