ArrayIndexOutOfBoundsException when refresh JDTS tree

If we have opened JDTS in tester mode with wd, based on all.jtm template, and try to create new wd, based on readiness.jtm template, we may see:

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 2 >= 1
            at java.util.Vector.elementAt(Vector.java:427)
            at javax.swing.tree.DefaultMutableTreeNode.getChildAt(DefaultMutableTreeNode.java:230)
            at javax.swing.tree.VariableHeightLayoutCache.treeNodesRemoved(VariableHeightLayoutCache.java:543)
            at javax.swing.plaf.basic.BasicTreeUI$Handler.treeNodesRemoved(BasicTreeUI.java:3810)
            at com.sun.javatest.exec.TestTreeModel$Notifier.run(TestTreeModel.java:1507)
            at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
            at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
            at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
            at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
            at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
            at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
            at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
            at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

it doesn't breaks tree functionality, but visible inside jdts console.

The root cause is removing tree nodes from JTree, from ContextManager.refreshIfNeeded().
Stack trace:

        at java.lang.Thread.dumpStack(Thread.java:1206)
        at com.sun.javatest.TestResultTable.notifyRemoveLeaf(TestResultTable.java:1856)
        at com.sun.javatest.TRT_TreeNode.rmChild(TRT_TreeNode.java:1564)
        at com.sun.javatest.TRT_TreeNode.refreshIfNeeded(TRT_TreeNode.java:791)
        at com.sun.javatest.TestResultTable.recursiveRefresh(TestResultTable.java:1801)
        at com.sun.javatest.TestResultTable.refreshIfNeeded(TestResultTable.java:1377)
        at com.sun.javatest.exec.ContextManager.refreshTestsImpl(ContextManager.java:308)
        at com.sun.javatest.exec.ContextManager.access$000(ContextManager.java:75)
        at com.sun.javatest.exec.ContextManager$1.run(ContextManager.java:242)
        at java.lang.Thread.run(Thread.java:619)