In Headwind MDM, the configuration is forcefully updated each hour (not 6 hours as in earlier versions).
This is done in app/src/main/java/com/hmdm/launcher/worker/PushNotificationWorker.java. See the parameter CONFIG_UPDATE_INTERVAL and its usage.
Note that this is a subclass of the Worker class, so it may be delayed when in sleep mode due to battery saving reasons.