Try to run the app from internal/PrinterUI (tag RT-22150) and click Home button. I'm getting the following endless exceptions and application becomes unresponsive.

java.lang.NullPointerException
at com.sun.javafx.scene.input.InputEventUtils.recomputeCoordinates(InputEventUtils.java:65)
at javafx.scene.input.MouseEvent.recomputeCoordinatesToSource(MouseEvent.java:274)
at javafx.scene.input.MouseEvent.impl_copy(MouseEvent.java:355)
at javafx.scene.Scene$MouseHandler.handleEnterExit(Scene.java:3209)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3290)
at javafx.scene.Scene$MouseHandler.access$8000(Scene.java:3103)
at javafx.scene.Scene$MouseHandler$1.run(Scene.java:3136)
at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:173)
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$1.run(WinApplication.java:62)
at java.lang.Thread.run(Thread.java:662)
java.lang.NullPointerException
at com.sun.javafx.scene.input.InputEventUtils.recomputeCoordinates(InputEventUtils.java:65)
at javafx.scene.input.MouseEvent.recomputeCoordinatesToSource(MouseEvent.java:274)
at javafx.scene.input.MouseEvent.impl_copy(MouseEvent.java:355)
at javafx.scene.Scene$MouseHandler.handleEnterExit(Scene.java:3209)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3290)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3148)
at javafx.scene.Scene$MouseHandler.access$1900(Scene.java:3103)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1530)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2246)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:227)
at com.sun.glass.ui.View.handleMouseEvent(View.java:528)
at com.sun.glass.ui.View.notifyMouse(View.java:921)
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)

It is triggered by UITransition.java:166 "setCache(false)" in onFinished animation handler.