When using Manager Watchdog on an Manager that is part of an MDR configuration, consider whether you want the Manager Watchdog to restart the Manager before failover can occur. If so, you must ensure that the value set for the MDR setting "Downtime Before Switchover" is greater than the Manager Watchdog setting of 30 seconds. This prevents the initiation of MDR, wherein the peer Manager takes over if the primary Manager fails. Trellix suggests retaining the default value of 5 minutes or greater to allow the Manager Watchdog time to restart the Manager.
If the Manager Watchdog brings up a primary Manager after MDR has initiated, note that the primary Manager does not come back Active; it checks first to determine whether the secondary is Active and if so, remains as standby.