ScrollPane scroll bars sometimes glitch out when their parent is dragged and dropped

[SKeeneCode]

Firstly great work on this and Jmetro!

I have a somewhat strange glitch happening. In my program the user can drag and drop tabs into different tab panes. These tabs have a scroll pane inside them and therefore have scrollbars with the JXSkin.

Sometimes I've noticed when dragging and dropping one of the scrollbars can sometimes not move where it should:

The second I move my mouse to where it should be, everything appears fixed but after the wide scrollbar animates out to be replaced with the thin one, it is in the wrong position again (but only sometimes :/).

I cannot get this glitch to work when using normal scroll bars, so I suspect it is the FXSkins library. Everything fixes itself if resize the stage in anyway so I suspect I'm causing a css/layout pass. Perhaps the scrollbar is not properly being labelled as dirty for a css pass when it should be?

This is with JavaFX17, FXSkins 1.0.0 and JMetro 11.6.15

I also get the following error sometimes:

java.lang.RuntimeException: Error while creating node:class javafx.scene.control.ScrollBar id:null
NODE INFORMATION
Node:ScrollBar@60ddfefe[styleClass=scroll-bar normal-scroll-bar] Class:class javafx.scene.control.ScrollBar Id:null
Children:[StackPane@717df4d9[styleClass=track-background], ScrollBarSkin$2@ab2165[styleClass=increment-button], ScrollBarSkin$3@6d684be0[styleClass=decrement-button], StackPane@2d7ce594[styleClass=track], ScrollBarSkin$1@33b907de[styleClass=thumb]]
PARENT INFORMATION
Node:ScrollPane@2beb2dbf[styleClass=scroll-pane] Class:class javafx.scene.control.ScrollPane Id:null
Children:[ScrollPaneSkin$5@52911160[styleClass=viewport], ScrollBar@7909bf3a[styleClass=scroll-bar], ScrollBar@5d2b5257[styleClass=scroll-bar], StackPane@419f7540[styleClass=corner], ScrollBar@5ce7c754[styleClass=scroll-bar minimal-scroll-bar], ScrollBar@5156ec96[styleClass=scroll-bar minimal-scroll-bar], ScrollBar@248851d5[styleClass=scroll-bar normal-scroll-bar]]

	at org.fxconnector.node.SVNodeFactory.createNode(SVNodeFactory.java:56)
	at org.fxconnector.StageControllerImpl.createNode(StageControllerImpl.java:773)
	at org.fxconnector.StageControllerImpl.lambda$new$10(StageControllerImpl.java:229)
	at javafx.base/com.sun.javafx.collections.ListListenerHelper$Generic.fireValueChangedEvent(ListListenerHelper.java:329)
	at javafx.base/com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
	at javafx.base/javafx.collections.ObservableListBase.fireChange(ObservableListBase.java:239)
	at javafx.base/javafx.collections.FXCollections$UnmodifiableObservableListImpl.lambda$new$0(FXCollections.java:963)
	at javafx.base/javafx.collections.WeakListChangeListener.onChanged(WeakListChangeListener.java:88)
	at javafx.base/com.sun.javafx.collections.ListListenerHelper$SingleChange.fireValueChangedEvent(ListListenerHelper.java:164)
	at javafx.base/com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
	at javafx.base/com.sun.javafx.collections.VetoableListDecorator.lambda$new$0(VetoableListDecorator.java:76)
	at javafx.base/com.sun.javafx.collections.ListListenerHelper$Generic.fireValueChangedEvent(ListListenerHelper.java:329)
	at javafx.base/com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
	at javafx.base/javafx.collections.ObservableListBase.fireChange(ObservableListBase.java:239)
	at javafx.base/javafx.collections.ListChangeBuilder.commit(ListChangeBuilder.java:482)
	at javafx.base/javafx.collections.ListChangeBuilder.endChange(ListChangeBuilder.java:541)
	at javafx.base/javafx.collections.ObservableListBase.endChange(ObservableListBase.java:211)
	at javafx.base/javafx.collections.ModifiableObservableListBase.remove(ModifiableObservableListBase.java:190)
	at javafx.base/com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:331)
	at javafx.base/com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:220)
	at javafx.graphics/javafx.scene.Parent.toFront(Parent.java:729)
	at javafx.graphics/javafx.scene.Node.toFront(Node.java:2016)
	at com.pixelduke.control.skin.ConsciousScrollPaneSkin.doMouseEnteredOnNormalBar(ConsciousScrollPaneSkin.java:104)
	at com.pixelduke.control.skin.ConsciousScrollPaneSkin.mouseEnteredOnNormalVBar(ConsciousScrollPaneSkin.java:94)
	at javafx.base/com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:247)
	at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
	at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
	at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
	at javafx.base/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
	at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
	at javafx.base/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
	at javafx.base/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
	at javafx.base/javafx.event.Event.fireEvent(Event.java:198)
	at javafx.base/com.sun.javafx.event.EventQueue.fire(EventQueue.java:48)
	at javafx.graphics/javafx.scene.Scene$MouseHandler.handleEnterExit(Scene.java:3811)
	at javafx.graphics/javafx.scene.Scene$MouseHandler.process(Scene.java:3882)
	at javafx.graphics/javafx.scene.Scene.processMouseEvent(Scene.java:1878)
	at javafx.graphics/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2623)
	at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:411)
	at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:301)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
	at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:450)
	at javafx.graphics/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:424)
	at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:449)
	at javafx.graphics/com.sun.glass.ui.View.handleMouseEvent(View.java:557)
	at javafx.graphics/com.sun.glass.ui.View.notifyMouse(View.java:943)
	at com.sun.jna.Native.invokeLong(Native Method)
	at com.sun.jna.Function.invoke(Function.java:428)
	at com.sun.jna.Function.invoke(Function.java:361)
	at com.sun.jna.Library$Handler.invoke(Library.java:265)
	at com.sun.proxy.$Proxy8.CallWindowProc(Unknown Source)
	at ch.micheljung.fxwindow.DecorationWindowProcedure.callback(DecorationWindowProcedure.java:122)
	at jdk.internal.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at com.sun.jna.CallbackReference$DefaultCallbackProxy.invokeCallback(CallbackReference.java:520)
	at com.sun.jna.CallbackReference$DefaultCallbackProxy.callback(CallbackReference.java:551)
	at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:184)
	at java.base/java.lang.Thread.run(Thread.java:832)