TimerService.getTimers() does not return persisted timers in @PreDestroy method

Injecting the TimerService with an @Resource annotation

@Resource
private TimerService timerService;

When I call timerService.getTimers().size() in the @PreDestroy method, it always return 0.

If I deploy the same application in jboss eap 6, then timerService.getTimers().size() return 1.