[CSS] ProgressIndicator does not spin anymore since 8u20

Since the upgrade to JavaFX 8u20 my ProgressIndicator won't rotate anymore when using Caspian style.


import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.ProgressIndicator;
import javafx.stage.Stage;

public class TestApp2 extends Application {
    public static void main(String[] args) {
        launch();
    }

    @Override
    public void start(Stage stage) throws Exception {
        Application.setUserAgentStylesheet(Application.STYLESHEET_CASPIAN);
        ProgressIndicator progressIndicator = new ProgressIndicator();
        // Workaround:
        // progressIndicator.setStyle("-fx-spin-enabled: true;");

        Scene scene = new Scene(progressIndicator);
        stage.setScene(scene);
        stage.show();
    }
}