JavaFX updating Cells wrong -> Bug?

I got a very strange bug in a JavafX application. A cell should be conditionally formatted due to a boolean. If you scroll up and down the ListView, however, the various entries are highlighted in color. However, there is only one entry in the entire list that should be marked.

serialNumberList.setCellFactory(lv -> new ListCell<ListData>() {
	@Override
	protected void updateItem(ListData c, boolean empty) {
		super.updateItem(c, empty);

		if (empty) {
			setText(null);
		} else {
			setText(c.name);
		}

		System.out.println(c);
		if (c != null && c.colored) {
			setStyle("-fx-background-color: #33CEFF");
		}
	}
});

The ListData Class:

String name;
boolean colored = false;
int id;

public ListData(String name, boolean colored, int id) {
	this.name = name;
	this.colored = colored;
	this.id= id;
}

The result before scrolling:

The result after scrolling a few times:

Thanks to @scary-wombat and to @kleopatra

	serialNumberList.setCellFactory(lv -> new ListCell<ListData>() {
		@Override
		protected void updateItem(ListData c, boolean empty) {
			super.updateItem(c, empty);

			if (empty) {
				setText(null);
			} else {
				setText(c.name);
			}
			System.out.println(c);
			if (c != null && c.colored) {
				setStyle("-fx-background-color: #33CEFF");
			}
			else {
				setStyle(null);
			}
		}
	});

The only thing to do was to set "unstyled"

Thanks!

In your cell factory, you have defined a condition where you can paint your cell in blue, but you haven't done the opposite action. In addition, you must insert a condition for empty cells.

You have to modify the end of your updateItem method:

if (c != null && !empty && c.colored)
    setStyle("-fx-background-color: #33CEFF");
else
    setStyle(null);