JavaFX ColumnConstraint minWidth being ignored, preWidth used, when resizing Window - javafx

Question

I'm I wrong to think that when resizing a window for a JavaFX-based application, the configured minimum size for a column width constraint should be used instead of the preferred size?
The program is pretty simple, from a book: JavaFX 9 By Example, with some minor changes to work in Eclipse with JavaFX 15.
First a picture showing the desired outcome. I've set the fxml ColumnConstraints prefWidth value to 50, which is the same as the minWidth.
Now, the same application is launched with a single change: the prefWidth is set to 150 instead of 50. When making the horizontal window size smaller with the mouse, you can see that the application is not using the minWidth setting (minWidth was not changed). I didn't shrink the horizontal to its minimum, to make it more visually obvious that the contents are being clipped.
Following are the two additional classes in this project (am skipping displaying the module-info). But I don't think there is anything here that affects the gist of the question.
package com.jfxbe;
import java.io.IOException;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class FXMLContactFormX extends Application {
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
Application.launch(args);
}
#Override
public void start(Stage stage) {
stage.setTitle("FXMLContactForm ");
Parent root = null;
try {
root = FXMLLoader.load(getClass().getResource("ContactFormX.fxml"));
} catch (IOException e) {
e.printStackTrace();
}
Scene scene = new Scene(root, 380, 150, Color.WHITE);
stage.setScene(scene);
stage.setMinWidth(200);
stage.setMinHeight(150);
stage.show();
}
}
package com.jfxbe;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
public class ContactFormXController {
#FXML private TextField firstNameField;
#FXML private TextField lastNameField;
#FXML private Button saveButton;
#FXML
protected void saveContactAction(ActionEvent event) {
System.out.println("Saving the following information: ");
System.out.println("First Name: " + firstNameField.getText());
System.out.println(" Last Name: " + lastNameField.getText());
}
}
Am I missing something in how column constraints work? Is there documentation that explains what is going on with the minWidth being ignored or not?