Maintenance Mode Exit Health status not a New state change
When SCOM enters maintenance mode and then exits it will re-examine the health of objects and re-discover issues that have already been raised previously - causing more alerts. It should check previous state before maintenance and not re-alert for something that has not changed. Alternatively if the state of alert is changed to something like "Acknowledged" then it should not keep alerting or appearing as a "New" state change.
At least make it a choice.