ADDITIONAL SYSTEM INFORMATION :
MacBook Pro 2021 with Apple M1 Pro (has also been reproduced with an Intel Mac on our codebase)
macOS Sonoma Version 14.4.1 (23E224)
Amazon Corretto 21.0.3


A DESCRIPTION OF THE PROBLEM :
We have this setup in our application
if (Desktop.getDesktop().isSupported(Desktop.Action.APP_QUIT_HANDLER)) {
    Desktop.getDesktop().setQuitHandler((e, response) -> // our quit code here
    ));
}
(Desktop is an awt class)
Up until JavaFx 21.0.1 this has worked. In JavaFx 21.0.2 and higher (including 22.x and 23ea) the handler does not get called anymore (attaching a breakpoint to the handler code reveals this). This results in the quit option in the dock popup menu to do nothing instead of quitting the application.

REGRESSION : Last worked in version 21

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Setup a quitHandler like so
(Desktop.getDesktop().isSupported(Desktop.Action.APP_QUIT_HANDLER)) {
    Desktop.getDesktop().setQuitHandler((e, response) -> // quit code here
    ));
}

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Dock popup menu's quit option triggers this handler.
ACTUAL -
Nothing happens when the dock popup menu's quit option is clicked.

CUSTOMER SUBMITTED WORKAROUND :
Downgrading to 21.0.1 or lower fixes the issue however there are other issues in 21.0.1 and lower that we'd like to fix by upgrading.

FREQUENCY : always