NPE in ContextMenu

Steps:
1. Run HelloPopupMenu.java
2. Space bar (opens the menu)
3. Down arrow till Weekdays or Types (menu)
4. Arrow right (opens the menu)
5. Arrow left (closes the menu)
6. Arrow right again - instead of reopening the menu it NPE:

Stack:
Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
at com.sun.javafx.scene.control.skin.ContextMenuContent.processRightKey(ContextMenuContent.java:602)
at com.sun.javafx.scene.control.skin.ContextMenuContent.access$19(ContextMenuContent.java:590)
at com.sun.javafx.scene.control.skin.ContextMenuContent$1.handle(ContextMenuContent.java:473)
at com.sun.javafx.scene.control.skin.ContextMenuContent$1.handle(ContextMenuContent.java:1)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.stage.PopupWindow$PopupEventRedirector.handleKeyEvent(PopupWindow.java:976)
at javafx.stage.PopupWindow$PopupEventRedirector.handleRedirectedEvent(PopupWindow.java:948)
at com.sun.javafx.event.EventRedirector.dispatchCapturingEvent(EventRedirector.java:106)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchCapturingEvent(CompositeEventDispatcher.java:43)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:52)
at com.sun.javafx.event.EventRedirector.redirectEvent(EventRedirector.java:124)
at com.sun.javafx.event.EventRedirector.dispatchCapturingEvent(EventRedirector.java:103)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchCapturingEvent(CompositeEventDispatcher.java:43)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:52)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$KeyHandler.process(Scene.java:3926)
at javafx.scene.Scene$KeyHandler.access$2(Scene.java:3918)
at javafx.scene.Scene.impl_processKeyEvent(Scene.java:2001)
at javafx.scene.Scene$ScenePeerListener.keyEvent(Scene.java:2463)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$KeyEventNotification.run(GlassViewEventHandler.java:197)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$KeyEventNotification.run(GlassViewEventHandler.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleKeyEvent(GlassViewEventHandler.java:227)
at com.sun.glass.ui.View.handleKeyEvent(View.java:544)
at com.sun.glass.ui.View.notifyKey(View.java:954)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$4(WinApplication.java:102)
at com.sun.glass.ui.win.WinApplication$$Lambda$37/32221281.run(Unknown Source)
at java.lang.Thread.run(Thread.java:744)