FULL PRODUCT VERSION :
java version "1.8.0_152-ea"
Java(TM) SE Runtime Environment (build 1.8.0_152-ea-b02)
Java HotSpot(TM) 64-Bit Server VM (build 25.152-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
OSX 10.10.5 MacBook Pro Retina NVIDIA GeForce GT 650M 1024 MB

A DESCRIPTION OF THE PROBLEM :
The test program draws several little windsock symbols at various angles.
For the combination of a cache hint SPEED and a rotation angle of either 90°
or 270° the symbol is just not drawn. This does not happen for any
other cache hint setting.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the attached test program. There should be 10 symbols shown. If you have selected the cache hint SPEED only 8 symbols are shown.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
There should always be 10 symbols independently of the chosen cache hint.
ACTUAL -
If you have selected the cache hint SPEED only 8 symbols are shown.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package bugs.cache;

import javafx.application.Application;
import javafx.geometry.Point2D;
import javafx.scene.CacheHint;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 * This demo shows a critical rendering problem of JavaFX.
 * The program draws several little windsock symbols at various angles.
 * For the combination of a cache hint SPEED and an angle of either 90°
 * or 270° the symbol is just not drawn. This does not happen for any
 * other cache hint setting.
 *
 * @author Michael Paus
 */
public class CacheRenderingTest extends Application {

// Error for CacheHint.SPEED. All other cache hint values seem to be ok.
private final static CacheHint cacheHint = CacheHint.SPEED;

private final static boolean cache = true;

private final static double WIDTH = 600;
private final static double HEIGHT = 300;

    private final StackPane graphicsPane = new StackPane();
    private final Pane drawingPane = new Pane();
    private final Group graphics = new Group();
    
@Override
public void start(Stage stage) throws Exception {
        stage.setTitle(getClass().getSimpleName());
        
        BorderPane root = new BorderPane();
        root.setCenter(graphicsPane);
        
        drawingPane.getChildren().add(graphics);
        
        graphicsPane.getChildren().add(drawingPane);
                
        Scene scene = new Scene(root, WIDTH, HEIGHT);
        stage.setScene(scene);
        stage.show();
        
        graphics.getChildren().add(new WindSockSymbol(new Point2D(100, 100), 0, cache, cacheHint));
        graphics.getChildren().add(new WindSockSymbol(new Point2D(200, 100), 45, cache, cacheHint));
        graphics.getChildren().add(new WindSockSymbol(new Point2D(300, 100), 90, cache, cacheHint));
        graphics.getChildren().add(new WindSockSymbol(new Point2D(400, 100), 135, cache, cacheHint));
        graphics.getChildren().add(new WindSockSymbol(new Point2D(500, 100), 180, cache, cacheHint));
                
        graphics.getChildren().add(new WindSockSymbol(new Point2D(100, 200), 180, cache, cacheHint));
        graphics.getChildren().add(new WindSockSymbol(new Point2D(200, 200), 225, cache, cacheHint));
        graphics.getChildren().add(new WindSockSymbol(new Point2D(300, 200), 270, cache, cacheHint));
        graphics.getChildren().add(new WindSockSymbol(new Point2D(400, 200), 315, cache, cacheHint));
        graphics.getChildren().add(new WindSockSymbol(new Point2D(500, 200), 360, cache, cacheHint));
}

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

}

package bugs.cache;

import javafx.geometry.Point2D;
import javafx.scene.CacheHint;
import javafx.scene.Group;
import javafx.scene.effect.DropShadow;
import javafx.scene.paint.Color;
import javafx.scene.shape.Polygon;
import javafx.scene.shape.StrokeType;

public class WindSockSymbol extends Group {

private final static boolean FIX_CACHE_PROBLEM = false;

private final static Color strokeColor = Color.WHITE;

private final static Color fillColor = Color.CRIMSON;

private final static DropShadow shadowEffect = new DropShadow();

static {
shadowEffect.setRadius(6.0);
shadowEffect.setOffsetX(0.0);
shadowEffect.setOffsetY(0.0);
shadowEffect.setColor(Color.BLACK);
}

private final Point2D projectedLocation;

private final double windDirectionDeg;

private final Polygon arrow;

private final CacheHint cacheHint;

public WindSockSymbol(Point2D labelRefPoint, double windDirectionDeg, boolean cache, CacheHint cacheHint) {
this.projectedLocation = labelRefPoint;
this.windDirectionDeg = windDirectionDeg;
this.cacheHint = cacheHint;
this.setMouseTransparent(true);

arrow = new Polygon(-6, -12, -1, +12, 1, +12, +6, -12);
arrow.setStroke(strokeColor);
arrow.setStrokeType(StrokeType.OUTSIDE);
arrow.setStrokeWidth(1.0);
arrow.setFill(fillColor);
arrow.setCache(cache);
arrow.setCacheHint(cacheHint);
getChildren().add(arrow);

arrow.setEffect(shadowEffect);

this.setLayoutX(projectedLocation.getX());
this.setLayoutY(projectedLocation.getY());

adjustData();
}

private void adjustData() {
arrow.rotateProperty().set(windDirectionDeg);

// This is just to fix a JavaFX-Bug. When the cacheHint is SPEED the
// arrow just disappears if the rotation is 90° or 270°. This does not seem to happen
// for other cache hints.
if (FIX_CACHE_PROBLEM && windDirectionDeg % 90 == 0) {
arrow.setCacheHint(CacheHint.ROTATE);
} else {
arrow.setCacheHint(cacheHint);
}
}

}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
The only workaround is not to use the cache hint SPEED.