This is a minimal test case for RT-17772 as requested by Leif.

Sorry for creating a subtask, but I don't have the ability to comment on a jira I didn't create, and I already had this test case lying around for the same issue.
Original issue was posted to forum => https://forums.oracle.com/forums/thread.jspa?threadID=2305905&tstart=0
Workaround for issue is to use Platform.runLater to set the text field, so you can see what I think giovanni is trying to achieve.
Enter a string starting with the letter g is permitted by the test case. Entering a string starting with any other value (should) set the text to empty.

import javafx.application.Application;
import javafx.application.Platform;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.Scene;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
 
public class TextFieldResetTest extends Application {
  public static void main(String[] args) { Application.launch(args); }
  @Override public void start(Stage primaryStage) {
    final TextField t = new TextField();
    t.textProperty().addListener(new ChangeListener<String>() {
      @Override public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
        if (!newValue.startsWith("g") && !"".equals(newValue))
          t.setText("");
          // Platform.runLater(new Runnable() { public void run() { t.setText(""); } });
      }
    });

    VBox root = new VBox();
    root.getChildren().addAll(t);
    primaryStage.setScene(new Scene(root, 300, 100));
    primaryStage.show();
  }
}