I have previously used Leap in 4.7 successfully. In the latest release when I attach the leap controller to the player camera there is an offset that appears to be approximately double the distance from the player camera to world zero (0,0,0). When I then rotate the players view, the controller moves in an arc past the player and back again.
It seems to work okay in the Leap examples. If I copy these into a new project, they stop working.