After upgrade from 1.617 to 1.652 we have noticed that builds with quiet_period are not delayed after each POST trigger. The timer is set to 60s and our app sends POST requests to buildWithParameters every 1-3s until it has no events to process. In our workflow this build was always waiting until the last event and then started counting down from 60s. Now it counts down from 60s on first trigger no matter how many events were triggered. When it goes down to 0 the build is started and another event queues another build with 60s timeout.