Management Center Failover.
This is the Default behavior of the MC HA. Secondary Device moves to Standalone after failover.
High availability with automatic mode :
We shut Device Primary, after one minute Virtual-IP move to device Secondary
device Secondary changes to standalone mode
MC# failover view
Failover:
Status: Disabled automatically on YYYY-MM-DD HH:MM:SS by system
MC# failover view
Default Behavior of the MC HA. to declare itself as standalone after the failover
Unlike failover in SG, a secondary that became a primary would make itself secondary again if primary goes online