Any rescaling of tokens or background images resets the rotation of the object to upright again.
Steps:
1. Drag an image into the background layer.
2. Rotate the image so it is on its side.
3. Scale with the green scaling square (the orange scaling square looks like it will do the same thing, however it does nothing to the image when released).
Expected result: scales while staying rotated.
Actual result: the rotation resets before the scaling happens.