On the 27th of February maintenance was performed on the platform, which did not go well, though, most of the issues have been resolved by now.
Could you check if a simple device reboot solves connection issues?
Could you ensure, that the devices are using the latest firmware?
If the devices are in remote locations, could you try reinitiating connection to RMS by sending SMS with the following syntax:
- <router_password> rms_connect
Replace <router_password> with the password used to login to router's WebUI.
Otherwise, I would like you to send the serial numbers from the devices with the issue present. I would ask to look at them.