Unable to rotate box2d body with torque if revolute joint introduced


I created a simple body (PLAYER) which, as speed increased the angle of the body increases slightly. I set the torque property based on velocity, to change the body’s angle, and it looks like the player is leaning forward as he runs. Great.

I wanted to prevent my PLAYER from flipping over (when hitting other bodies), so I created a second body and placed a revolute joint between them. The second body has rotation disabled, and is dynamic. I discovered that I did not need to apply any angle limits to prevent flipping, since the joint seemed to resist rotation. The player actually rights himself if flipped on his side. (The joint seems to want to return to 0 angle). The motor is disabled, no motor speed, no motor torque. Still, the joint returns to 0′.

The PLAYER still rotates a bit when hitting other bodies, but I can no longer rotate the body with any torque value (to make him lean forward). Why? I need to restore the leaning effect.

I don’t understand why the second body + revolute joint prevent rotation due to any torque applied. Can someone explain, and offer solution?