FULL PRODUCT VERSION :
java version "1.8.0_66"
Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Linux Xavier 3.19.0-32-generic #37~14.04.1-Ubuntu SMP Thu Oct 22 09:41:40 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
In JDK-8096219, a user reported something similar for Mac. I'm not able to confirm if this bug appears on other Operating Systems.

Once the primary stage is shown, a FileChooser's title does not appear when one calls its 'show...Dialog" method.

Code below:
public class FileChooserTest extends Application {

    @Override
    public void start(Stage primaryStage) {
        FileChooser chooser = new FileChooser();
        chooser.setTitle("Title of Dialog");

        // Chooser's title appears here
        chooser.showOpenDialog(primaryStage);
        chooser.showOpenMultipleDialog(primaryStage);
        chooser.showSaveDialog(primaryStage);

        // once primaryStage is shown, titles will no longer appear
        primaryStage.show();

        // Chooser's title does not appear in either of these
        chooser.showOpenDialog(primaryStage);
        chooser.showOpenMultipleDialog(primaryStage);
        chooser.showSaveDialog(primaryStage);
    }
}

ADDITIONAL REGRESSION INFORMATION:
This worked in a prior release so I think it was broken sometime in the past few months. However, I don't know which version worked last.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
After the primary stage is shown, a dialog's window's title should appear whenever either of the three 'show...Dialog" methods are called.
ACTUAL -
The dialog window's title does not appear once the primary stage is shown.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
No crashes or Errors

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class FileChooserTest extends Application {

    @Override
    public void start(Stage primaryStage) {
        FileChooser chooser = new FileChooser();
        chooser.setTitle("Title of Dialog");

        // Chooser's title appears here
        chooser.showOpenDialog(primaryStage);
        chooser.showOpenMultipleDialog(primaryStage);
        chooser.showSaveDialog(primaryStage);

        // once primaryStage is shown, titles will no longer appear
        primaryStage.show();

        // Chooser's title does not appear in either of these
        chooser.showOpenDialog(primaryStage);
        chooser.showOpenMultipleDialog(primaryStage);
        chooser.showSaveDialog(primaryStage);
    }
}
---------- END SOURCE ----------