When stage minimum width/height is set before stage.show(), the stage is shown smaller and when I try to resize it it jump-grows to the set minimum size.
Reproducible on Windows, not reproducible on Mac.

    @Override public void start(Stage stage) {
        Group root = new Group();
        Scene scene = new Scene(root, 400, 400);

        stage.setScene(scene);
        stage.setMinWidth(800);
        stage.show();
    }