Run the attached application and drag it from one screen to another. Rectangles disappear and the following NPE is thrown sometimes.

Unexpected exception caught in MasterTimer.timePulse():
java.lang.NullPointerException
        at com.sun.scenario.effect.impl.j2d.rsl.RSLOneSamplerPeer.filterImpl(RSLOneSamplerPeer.java:64)
        at com.sun.scenario.effect.impl.j2d.rsl.RSLEffectPeer$1.run(RSLEffectPeer.java:65)
        at com.sun.scenario.effect.impl.j2d.rsl.RSLEffectPeer$1.run(RSLEffectPeer.java:63)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.scenario.effect.impl.j2d.rsl.RSLEffectPeer.filter(RSLEffectPeer.java:63)
        at com.sun.scenario.effect.impl.state.LinearConvolveKernel.filterImageDatas(LinearConvolveKernel.java:340)
        at com.sun.scenario.effect.BoxShadow.filterImageDatas(BoxShadow.java:393)
        at com.sun.scenario.effect.FilterEffect.filter(FilterEffect.java:94)
        at com.sun.scenario.effect.Offset.filter(Offset.java:158)
        at com.sun.scenario.effect.FilterEffect.filter(FilterEffect.java:86)
        at com.sun.scenario.effect.DelegateEffect.filter(DelegateEffect.java:65)
        at com.sun.scenario.effect.FilterEffect.filter(FilterEffect.java:86)
        at com.sun.scenario.effect.impl.j2d.J2DEffectHelper.render(J2DEffectHelper.java:79)
        at com.sun.scenario.scenegraph.SGEffect.render(SGEffect.java:173)
        at com.sun.scenario.scenegraph.SGFilter.render(SGFilter.java:299)
        at com.sun.scenario.scenegraph.SGFilter.render(SGFilter.java:233)
        at com.sun.scenario.scenegraph.SGTransform.render(SGTransform.java:280)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:123)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:225)
        at com.sun.scenario.scenegraph.SGTransform.render(SGTransform.java:280)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:123)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:225)
        at com.sun.scenario.scenegraph.SGFilter.render(SGFilter.java:233)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:123)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:225)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:123)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:225)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:123)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:225)
        at com.sun.scenario.scenegraph.JSGPanel.paintComponent(JSGPanel.java:233)
        at javax.swing.JComponent.paint(JComponent.java:1027)
        at javax.swing.JComponent.paintChildren(JComponent.java:864)
        at javax.swing.JComponent.paint(JComponent.java:1036)
        at javax.swing.JLayeredPane.paint(JLayeredPane.java:564)
        at javax.swing.JComponent.paintChildren(JComponent.java:864)
        at javax.swing.JComponent.paint(JComponent.java:1036)
        at javax.swing.JComponent.paintToOffscreen(JComponent.java:5122)
        at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:277)
        at javax.swing.RepaintManager.paint(RepaintManager.java:1217)
        at javax.swing.JComponent._paintImmediately(JComponent.java:5070)
        at javax.swing.JComponent.paintImmediately(JComponent.java:4880)
        at javax.swing.JComponent.paintImmediately(JComponent.java:4892)
        at com.sun.scenario.scenegraph.JSGPanel.repaintDirtyRegions(JSGPanel.java:323)
        at com.sun.scenario.scenegraph.JSGPanelRepainter.repaintAll(JSGPanelRepainter.java:122)
        at com.sun.scenario.scenegraph.JSGPanelRepainter$FrameDisplay.run(JSGPanelRepainter.java:134)
        at com.sun.scenario.animation.AbstractMasterTimer.timePulseImpl(AbstractMasterTimer.java:397)
        at com.sun.scenario.animation.AbstractMasterTimer$MainLoop.run(AbstractMasterTimer.java:274)
        at com.sun.embeddedswing.EmbeddedEventQueue.doPulse(EmbeddedEventQueue.java:562)
        at com.sun.embeddedswing.EmbeddedEventQueue.access$000(EmbeddedEventQueue.java:74)
        at com.sun.embeddedswing.EmbeddedEventQueue$2.run(EmbeddedEventQueue.java:465)
        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)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at com.sun.scenario.effect.impl.sw.sse.SSEBoxShadowPeer.filter(SSEBoxShadowPeer.java:94)
        at com.sun.scenario.effect.impl.state.LinearConvolveKernel.filterImageDatas(LinearConvolveKernel.java:351)
        at com.sun.scenario.effect.BoxShadow.filterImageDatas(BoxShadow.java:393)
        at com.sun.scenario.effect.FilterEffect.filter(FilterEffect.java:94)
        at com.sun.scenario.effect.Offset.filter(Offset.java:158)
        at com.sun.scenario.effect.FilterEffect.filter(FilterEffect.java:86)
        at com.sun.scenario.effect.DelegateEffect.filter(DelegateEffect.java:65)
        at com.sun.scenario.effect.FilterEffect.filter(FilterEffect.java:86)
        at com.sun.scenario.effect.impl.j2d.J2DEffectHelper.render(J2DEffectHelper.java:79)
        at com.sun.scenario.scenegraph.SGEffect.render(SGEffect.java:173)
        at com.sun.scenario.scenegraph.SGFilter.render(SGFilter.java:299)
        at com.sun.scenario.scenegraph.SGFilter.render(SGFilter.java:233)
        at com.sun.scenario.scenegraph.SGTransform.render(SGTransform.java:280)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:123)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:225)
        at com.sun.scenario.scenegraph.SGTransform.render(SGTransform.java:280)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:123)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:225)
        at com.sun.scenario.scenegraph.SGFilter.render(SGFilter.java:233)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:123)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:225)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:123)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:225)
        at com.sun.scenario.scenegraph.SGWrapper.render(SGWrapper.java:123)
        at com.sun.scenario.scenegraph.SGGroup.render(SGGroup.java:225)
        at com.sun.scenario.scenegraph.JSGPanel.paintComponent(JSGPanel.java:233)
        at javax.swing.JComponent.paint(JComponent.java:1027)
        at javax.swing.JComponent.paintChildren(JComponent.java:864)
        at javax.swing.JComponent.paint(JComponent.java:1036)
        at javax.swing.JLayeredPane.paint(JLayeredPane.java:564)
        at javax.swing.JComponent.paintChildren(JComponent.java:864)
        at javax.swing.JComponent.paintToOffscreen(JComponent.java:5129)
        at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:277)
        at javax.swing.RepaintManager.paint(RepaintManager.java:1217)
        at javax.swing.JComponent.paint(JComponent.java:1013)
        at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:21)
        at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:60)
        at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:97)
        at java.awt.Container.paint(Container.java:1762)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:714)
        at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:694)
        at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:128)
        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)