Spring @Scheduled Not Working in Vaadin

I have a Vaadin 8 UI application using a full-fledged Spring backend. I have found that my scheduled services (annotated with @Async @Scheduled) are not running. I do not see any errors. How can such CRON/Quartz jobs be run with Vaadin/Spring?

@Scheduled(cron = "0 0 0 * * ?")
public void at0000Daily() throws Exception {
    // Whatever

Vaadin/Spring shouldn’t affect the running of scheduled events. Have you checked this thread yet: https://vaadin.com/forum#!/thread/1785682