Promises are not working inside applicationShouldTerminate

[jeff-h]

I'd like to gracefully clean up some stuff using Promises when my app quits, so I've implemented applicationShouldTerminate. I'm definitely making it inside that method, but my promise code inside it only works when the app is quit via Command-Q. If I quit the app programmatically using NSApplication.shared.terminate(self) the applicationShouldTerminate does run, but the promises inside it do nothing.

I've tested this in a fresh project with the following:

func applicationShouldTerminate(_ sender: NSApplication) -> NSApplication.TerminateReply {
    print("applicationShouldTerminate")

     let promise = Promise<Void> { fulfill, reject in
          print("hello")
          fulfill(())
    }

     DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(5)) {
          NSApplication.shared.reply(toApplicationShouldTerminate: true)
    }

     return .terminateLater
}

When I quit with cmd-Q this works perfectly but when I quit the app programmatically using NSApplication.shared.terminate(self) it prints applicationShouldTerminate but nothing else happens and the app never quits.

Any suggestions?