ArrayIndexOutOfBoundsException when selecting a TextArea

Consider loading the attached NB project. Run it and you get the Ticketing demo up.
In the tree view on the left click on "Project1".
Click on the top left button "New Ticket".
In the details part (bottom right) click on the TextArea below the label "Description:" then you get the exception below.
From now hit a character on your keyboard and you get the second exception.

java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.ArrayList.get(ArrayList.java:324)
at com.sun.javafx.collections.ObservableListWrapper.get(ObservableListWrapper.java:141)
at com.sun.javafx.scene.control.skin.TextAreaSkin$ContentView.layoutChildren(TextAreaSkin.java:182)
at javafx.scene.Parent.layout(Parent.java:886)
at javafx.scene.Parent.layout(Parent.java:896)
at javafx.scene.Scene.layoutDirtyRoots(Scene.java:428)
at javafx.scene.Scene.doLayoutPass(Scene.java:401)
at javafx.scene.Scene.access$2800(Scene.java:126)
at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:1719)
at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:283)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:398)
at com.sun.javafx.tk.quantum.QuantumToolkit$10.run(QuantumToolkit.java:330)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
at com.sun.glass.ui.win.WinApplication$2$1.run(WinApplication.java:62)
at java.lang.Thread.run(Thread.java:662)

java.lang.IndexOutOfBoundsException
at javafx.scene.control.TextInputControl.replaceText(TextInputControl.java:466)
at com.sun.javafx.scene.control.skin.TextInputControlSkin.handleKeyTypedEvent(TextInputControlSkin.java:567)
at com.sun.javafx.scene.control.skin.TextInputControlSkin$8.handle(TextInputControlSkin.java:114)
at com.sun.javafx.scene.control.skin.TextInputControlSkin$8.handle(TextInputControlSkin.java:111)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:56)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:162)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:115)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:47)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:33)
at javafx.event.Event.fireEvent(Event.java:171)
at javafx.scene.Scene$KeyHandler.process(Scene.java:2821)
at javafx.scene.Scene$KeyHandler.access$1500(Scene.java:2751)
at javafx.scene.Scene.impl_processKeyEvent(Scene.java:1353)
at javafx.scene.Scene$ScenePeerListener.keyEvent(Scene.java:1784)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleKeyEvent(GlassViewEventHandler.java:105)
at com.sun.glass.ui.View.handleKeyEvent(View.java:248)
at com.sun.glass.ui.View.notifyKey(View.java:534)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(WinApplication.java:29)
at com.sun.glass.ui.win.WinApplication$2$1.run(WinApplication.java:62)
at java.lang.Thread.run(Thread.java:662)