This may o may not be a bug.

While developing ScenicView I've noticed that the boundInParent variable of one of the root nodes of the example scenes gets repeatedly updated, it can be reproduced downloading ScenicView for fxexperience and selecting the root TilePane. To launch ScenicView with examples:

java -cp pathToJFXRT.jar;pathToTools.jar;ScenicView.jar com.javafx.experiments.scenicview.example.ScenicViewExample

When a variable is udpated it becomes red in the DetailPane.

This is the stacktrace from where the update come from

java.lang.Exception: NodeBoundsBoundingBox [minX:0.0, minY:-18.533008575439453, minZ:0.0, width:1072.0, height:498.53302001953125, depth:0.0, maxX:1072.0, maxY:480.0000114440918, maxZ:0.0]
    at com.javafx.experiments.fxconnector.details.NodeDetailPaneInfo.updateDetail(NodeDetailPaneInfo.java:409)
    at com.javafx.experiments.fxconnector.details.DetailPaneInfo$1.updateDetail(DetailPaneInfo.java:53)
    at com.javafx.experiments.fxconnector.PropertyTracker$1.invalidated(PropertyTracker.java:50)
    at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:359)
    at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:100)
    at javafx.scene.Node$LazyBoundsProperty.invalidate(Node.java:7555)
    at javafx.scene.Node$MiscProperties.invalidateBoundsInParent(Node.java:4980)
    at javafx.scene.Node.invalidateBoundsInParent(Node.java:2730)
    at javafx.scene.Node.transformedBoundsChanged(Node.java:3349)
    at javafx.scene.Node.localBoundsChanged(Node.java:3333)
    at javafx.scene.Node.impl_geomChanged(Node.java:3321)
    at javafx.scene.Parent.impl_geomChanged(Parent.java:1705)
    at javafx.scene.Parent.childBoundsChanged(Parent.java:1729)
    at javafx.scene.Node.notifyParentOfBoundsChange(Node.java:3382)
    at javafx.scene.Node.transformedBoundsChanged(Node.java:3351)
    at javafx.scene.Node.impl_transformsChanged(Node.java:3774)
    at javafx.scene.Node$14.invalidated(Node.java:2237)
    at javafx.beans.property.DoublePropertyBase.markInvalid(DoublePropertyBase.java:129)
    at javafx.beans.property.DoublePropertyBase.set(DoublePropertyBase.java:163)
    at javafx.scene.Node.setLayoutX(Node.java:2224)
    at javafx.scene.Node.relocate(Node.java:2328)
    at javafx.scene.layout.Region.position(Region.java:2033)
    at javafx.scene.layout.Region.layoutInArea(Region.java:2014)
    at javafx.scene.layout.Region.layoutInArea(Region.java:1915)
    at javafx.scene.layout.TilePane.layoutChildren(TilePane.java:866)
    at javafx.scene.Parent.layout(Parent.java:1018)
    at javafx.scene.Scene.layoutDirtyRoots(Scene.java:513)
    at javafx.scene.Scene.doLayoutPass(Scene.java:484)
    at javafx.scene.Scene.access$3900(Scene.java:169)
    at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:2199)
    at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:363)
    at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:460)
    at com.sun.javafx.tk.quantum.QuantumToolkit$9.run(QuantumToolkit.java:329)
    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$3$1.run(WinApplication.java:73)
    at java.lang.Thread.run(Thread.java:662)
java.lang.Exception: NodeBoundsBoundingBox [minX:0.0, minY:-18.533008575439453, minZ:0.0, width:1072.0, height:498.53302001953125, depth:0.0, maxX:1072.0, maxY:480.0000114440918, maxZ:0.0]
    at com.javafx.experiments.fxconnector.details.NodeDetailPaneInfo.updateDetail(NodeDetailPaneInfo.java:409)
    at com.javafx.experiments.fxconnector.details.DetailPaneInfo$1.updateDetail(DetailPaneInfo.java:53)
    at com.javafx.experiments.fxconnector.PropertyTracker$1.invalidated(PropertyTracker.java:50)
    at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:359)
    at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:100)
    at javafx.scene.Node$LazyBoundsProperty.invalidate(Node.java:7555)
    at javafx.scene.Node$MiscProperties.invalidateBoundsInParent(Node.java:4980)
    at javafx.scene.Node.invalidateBoundsInParent(Node.java:2730)
    at javafx.scene.Node.transformedBoundsChanged(Node.java:3349)
    at javafx.scene.Node.localBoundsChanged(Node.java:3333)
    at javafx.scene.Node.impl_geomChanged(Node.java:3321)
    at javafx.scene.Parent.impl_geomChanged(Parent.java:1705)
    at javafx.scene.Parent.childBoundsChanged(Parent.java:1729)
    at javafx.scene.Node.notifyParentOfBoundsChange(Node.java:3382)
    at javafx.scene.Node.transformedBoundsChanged(Node.java:3351)
    at javafx.scene.Node.impl_transformsChanged(Node.java:3774)
    at javafx.scene.Node$15.invalidated(Node.java:2298)
    at javafx.beans.property.DoublePropertyBase.markInvalid(DoublePropertyBase.java:129)
    at javafx.beans.property.DoublePropertyBase.set(DoublePropertyBase.java:163)
    at javafx.scene.Node.setLayoutY(Node.java:2285)
    at javafx.scene.Node.relocate(Node.java:2329)
    at javafx.scene.layout.Region.position(Region.java:2033)
    at javafx.scene.layout.Region.layoutInArea(Region.java:2014)
    at javafx.scene.layout.Region.layoutInArea(Region.java:1915)
    at javafx.scene.layout.TilePane.layoutChildren(TilePane.java:866)
    at javafx.scene.Parent.layout(Parent.java:1018)
    at javafx.scene.Scene.layoutDirtyRoots(Scene.java:513)
    at javafx.scene.Scene.doLayoutPass(Scene.java:484)
    at javafx.scene.Scene.access$3900(Scene.java:169)
    at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:2199)
    at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:363)
    at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:460)
    at com.sun.javafx.tk.quantum.QuantumToolkit$9.run(QuantumToolkit.java:329)
    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$3$1.run(WinApplication.java:73)
    at java.lang.Thread.run(Thread.java:662)