Javafx Custom Tooltip Implementation Only Shows on Last Node Installed

I'm trying to create my own Tooltip implementation, that has an arrow and shows the tooltip on a certain side of the node it's installed on.
It looks like this:

Here's what i've coded so far

Tooltip.java

public class Tooltip extends PopupControl

private StringProperty message = new SimpleStringProperty();
private final static TooltipSkin skin = new TooltipSkin();
private final static TooltipBehavior behavior = new TooltipBehavior();

public Tooltip(Node node, String message)
this.message.setValue(message);
if (getContent() != skin.createSkin())
getContent().setAll(skin.createSkin());

behavior.install(node, Tooltip.this);


/****************************************************************
********** ACCESSORS ************
****************************************************************/

String getMessage()
return message.get();


StringProperty messageProperty()
return message;


private static class TooltipBehavior
final String TOOLTIP_PROP_KEY = "fxtooltip";

private void install(Node node, Tooltip tooltip)
if (node == null)
return;
node.addEventHandler(MouseEvent.MOUSE_ENTERED, ENTERED_HANDLER);
node.addEventHandler(MouseEvent.MOUSE_EXITED, KILL_HANDLER);
node.addEventHandler(MouseEvent.MOUSE_PRESSED, KILL_HANDLER);
node.getProperties().put(TOOLTIP_PROP_KEY, tooltip);


private EventHandler<MouseEvent> ENTERED_HANDLER = (MouseEvent event) ->
Node hoveredNode = (Node) event.getSource();
Tooltip tooltip = ((Tooltip) hoveredNode.getProperties().get(TOOLTIP_PROP_KEY));
String message = tooltip.getMessage();
skin.setMessage(message);
tooltip.show(getWindow(hoveredNode), 0, 0);
;
private EventHandler<MouseEvent> KILL_HANDLER = (MouseEvent event) ->
Node hoveredNode = (Node) event.getSource();
Tooltip tooltip = ((Tooltip) hoveredNode.getProperties().get(TOOLTIP_PROP_KEY));
tooltip.hide();
;

private Window getWindow(final Node node)
final Scene scene = node == null ? null : node.getScene();
return scene == null ? null : scene.getWindow();



private static class TooltipSkin
private static HBox $RootView = new HBox();
private static StackPane $PaneMessageBody = new StackPane();
private static StackPane $PaneArrow = new StackPane();
private static Text $TextMessage = new Text();
private static boolean skinInitialized = false;

Pane createSkin()
if (skinInitialized)
return $RootView;
else
skinInitialized = true;
$RootView.getChildren().addAll($PaneMessageBody, $PaneArrow);
$PaneMessageBody.getChildren().addAll($TextMessage);

return $RootView;


void setMessage(String message)
$TextMessage.setText(message);





In my controller, I have some buttons i added tooltips to this way

new Tooltip($BtnDownload, "Download");
new Tooltip($BtnActivate, "Activate");


However, this only works on the last node a tooltip is installed on, If i hover over other nodes that have a tooltip, cursor starts flickering, and the tooltip doesn't show at all. What could the issue be here?

KILL_HANDLER

MOVE_HANDLER

0

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