ADDITIONAL SYSTEM INFORMATION :
Linux Ubuntu latest version and any other Linux

A DESCRIPTION OF THE PROBLEM :
I use canvas.setOnDragOver((ev)->... ) to intercept any drag event over a canvas. The canvas is repainted on each event. In Windows the behaviour is correct, and triggered on each mouse move.
On Linux this is triggered only one time.

I provide below a test class. Run it on Windows and try to drag the mouse over the text, you will get a bunch of messages 'Drag over'.
Do the same on Linux and you will get only one time the same message.

Second, there is in the code a line db.setDragView(), commented.
Uncomment it and make sure is pointing to a small image on disk.
Running the code on Linux you will get an exception like:
(java:5559): GLib-GObject-WARNING **: 08:10:27.208: ../../../../gobject/gsignal.c:2523: signal 'expose-event' is invalid for instance '0x7fac3014e520' of type 'GtkWindow'
This works fine in Windows.




REGRESSION : Last worked in version 12

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
import javafx.application.Application;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.input.ClipboardContent;
import javafx.scene.input.DataFormat;
import javafx.scene.input.Dragboard;
import javafx.scene.input.TransferMode;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.stage.Stage;

public class SampleRenderingIssue extends Application {
    private final StackPane root = new StackPane();
    private final Scene scene = new Scene(root, 300, 250);
    private final BorderPane pane = new BorderPane();
    private final Canvas canvas = new Canvas();


    @Override
    public void start(Stage stage) {
        stage.setTitle("Sample Canvas");

        HBox vbox = new HBox();
        HBox.setHgrow(pane, Priority.ALWAYS);
        vbox.getChildren().addAll( /*createTreeView(),*/ pane );

        pane.getChildren().add(canvas);
        root.getChildren().add(vbox);
        //scene.getStylesheets().add( SampleRenderingIssue.class.getResource("resources/dark.css").toExternalForm());
        stage.setScene(scene);
        stage.sizeToScene();
        setupCanvasPane();
        stage.show();
        Platform.runLater(()-> paint());
    }
    private void setupCanvasPane(){
        canvas.widthProperty().bind(pane.widthProperty());
        canvas.heightProperty().bind(pane.heightProperty());
        canvas.setOnDragDetected((ev)-> {System.out.println("Drag detected"); final ClipboardContent content = new ClipboardContent();
            final Dragboard db = canvas.startDragAndDrop(TransferMode.COPY);
            //db.setDragView(Resources.getImage("fk.png"));
            content.put(DataFormat.PLAIN_TEXT, 1);
            db.setContent(content);
            ev.consume();});
        canvas.setOnDragOver((ev)-> {System.out.println("Drag over"); ev.consume();});
        canvas.setOnDragDropped((ev)-> {System.out.println("Drag end"); ev.consume();});
        canvas.setOnDragDone((ev)-> {System.out.println("Drag done"); ev.consume();});
        pane.widthProperty().addListener((o,p,c)-> paint());
        paint();
    }

    public void paint(){
        GraphicsContext gr = canvas.getGraphicsContext2D();
        gr.clearRect( 0,0, canvas.getWidth(), canvas.getHeight() );
        gr.setFill( Color.web("#ffffff") );
        gr.fillRect( 0,0,canvas.getWidth(), canvas.getHeight());
        gr.setFont( Font.font( "Monospaced"));
        gr.setFill( Color.web("#e39d62") );
        gr.fillText("SELECT * FROM", 50, 70 );
        gr.setFill( Color.WHITE );
        gr.fillText("sample_table", 50, 88 );
    }



    public static void main(String[] args) {
        launch(args);
    }


}




FREQUENCY : always