One little known aspect of leadership is projection. This is where some team members will set the leader up as a pseudo parent and then project all their unresolved feelings (with their parents) onto the leader!
You know this is happening when team members begin to act like children by competing for attention, are jealous of each other, etc. They start responding to the leader with a level of feelings that are out of place.
Productivity goes down and upsets become more common.