When camera is Orthographic , and gameobject face camera， rotation cann't work.

[Personuo]

When the camera is in an orthographic view and the Euler angles of the controlled gameobject are (0,0,0), dragging the green and red axes does not result in any rotation of the object.

[Philippe-Torrelli-Ale]

I found the same issue, I hope Peter can fix it as this package is really good and useful..

If it helps, here are easy steps to reproduce the problem:
modify TestSceene so that

1. MainCamera position is 0. 0. -5 , no rotations
2. Cube is in 0,0,0 no rotations
3. in the "Runtime" game object, RunTimeTransformHandle component, switch type to ROTATION.

Run the scene.

You will then see that the X and Y slices are straight line, and their rotation planes are perpendicular to the camera.
In such a setup, you cannot rotate the cube.