Children are rendered outside the tile pane bounds.

Bug is reproducible with BASELINE_CENTER, BASELINE_LEFT, BASELINE_RIGHT

import com.sun.javafx.runtime.VersionInfo;
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.layout.TilePane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class Main extends Application {

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

    @Override
    public void start(Stage stage) throws Exception {
        stage.setTitle(VersionInfo.getRuntimeVersion());
        stage.setScene(createScene());
        stage.show();
    }

    private Scene createScene() {
        TilePane tile = new TilePane();
        tile.setPrefSize(150, 150);
        tile.setTileAlignment(Pos.CENTER_LEFT);
        for (int i = 0; i < 15; i++) {
            tile.getChildren().add(new Rectangle(20, 20, (i % 2 == 0) ? Color.RED : Color.BLUE));
        }

        tile.setStyle("-fx-pref-tile-width:40;-fx-pref-tile-height:35;-fx-tile-alignment:BASELINE_CENTER");
        
        Pane root = new Pane();
        root.setStyle("-fx-border-color:BLACK");
        root.setPrefSize(200, 200);
        
        root.getChildren().add(tile);
        root.setTranslateX(100);
        root.setTranslateY(100);
        Scene scene = new Scene(root, 600, 400);
        return scene;
    }
}