zerflin I am digging into it also and seeing that it was a compounding user account failure and some not all sites (mostly sites launched at the send half of the list) on that container failed, as the test site we get alerts on is the first site on each container it did not send any alerts.
I am working on a fix by making it check all instances for MySQL to send alerts. So sorry about the downtime and the problem. I will see if we can get some kind of reporting for this on our network status service so we can get alerted faster. I will post updates to this and in a new update that will go live tomorrow sometime.