Steps to reproduce:

• register event in app/field

          admincentralEventBus.addHandler(AppLifecycleEvent.class, new AppLifecycleEventHandler() {
              @Override
              public void onAppFocused(final AppLifecycleEvent event) {
                  System.out.println("onFocus");
              }
  
              @Override
              public void onAppStopped(final AppLifecycleEvent event) {
                  System.out.println("onStop");
              }
  
              @Override
              public void onAppStarted(final AppLifecycleEvent event) {
                  System.out.println("onStart");
              }
          });
  

• fire event
• nothing is printed in the console