The scheduled maintenance has been completed.

Scheduled maintenance is currently in progress. We will provide updates as necessary.

We will be perform maintenance during this time which will lead to some downtime.
Make sure your client are configured to reconnect.
If you can't have any downtime, migrate to a dedicated instance prior to this event, https://www.cloudmqtt.com/blog/2018-11-08-cloudmqtt-migration-between-plan.html

If you are having any issues with your instance after the maintenance, try restarting it from the CloudMQTT Console.