Observed Behavior:
Standing near a wall, and turning, can allow the follow camera to phase through the wall.
Expected Behavior:
Camera would "Bump" on collision with the wall mesh, and move forward, staying in the same room, just closer to the avatar.
More Info
In a recent update (possibly related to PBR, first noticed in Firestorm 7.x) this function changed. Previously, even with "Disable Camera Constraints" enabled, the followcam in it's 'default' [Escape Key] mode, would still bounce off objects (walls, celings, etc) to remain 'in the same room' with the avatar.
This is no longer the case. It works as expected when "Disable Camera Constraints" is unticked, but when ticked this 'camera bump' function no longer works.
The longstanding behavior of this function, going back over a decade, is that even with "Disable Camera Constraints" enabled, the default followcam would 'bump' off objects.