Hello,
If your RUT device was connected once to RMS and after a while, RMS service was turned off for a longer period, it will reconnect.
By default, our routers enter standby mode after few unsuccessful attempts to connect to the RMS. When router RMS settings are set to standby mode, it will try to connect to RMS only once every 6 hours. You can change it if you log in to router WebUI > System > Administration > RMS and change mode or press Connect button.
Regards.