Camera during spectate is stuck

[driftcalculus]

The third camera option (after pressing C twice) while spectating games leaves the camera view stuck at a point. The lower half of the screen resembles the sky, if the character being chased is on the ground.

 

[driftcalculus]

Using camera controls (J) the spectator can move up and the view appears normal, rather than pass through the ground an showing half the sky. Perhaps restricting the camera's vertical axis and adjusting the vertical spawn point of the view will fix this.