I have experienced a failover of my AlwaysOn groups. However I have alerts for failover set up and didn't receive any when this failover happened.
I am also unable to see an indication of the failover in the logs.
The only logs for that period, on the secondary, show the following:
22/01/2019 07:35:59 1641 Information Clustered role 'Group' is moving from cluster node 'SQL2' to cluster node 'SQL2'.
I'm just after some advice on why this might happen and how I can monitor for it.