The following happened once from HelloSanity:

Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
        at com.sun.glass.ui.Accessible.getAttribute(Accessible.java:119)
        at com.sun.glass.ui.win.WinAccessible.GetFocus(WinAccessible.java:1062)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.lambda$null$138(WinApplication.java:100)
        at com.sun.glass.ui.win.WinApplication$$Lambda$36/24503003.run(Unknown Source)


The following happened once from SceneBuilder:

java.lang.NullPointerException
        at com.sun.glass.ui.win.WinAccessible.GetSelection(WinAccessible.java:1135)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.lambda$null$138(WinApplication.java:100)
        at com.sun.glass.ui.win.WinApplication$$Lambda$36/25949449.run(Unknown Source)
        at java.lang.Thread.run(Thread.java:744)