Edit Projection on Triforma Form doesn't 'stick'

After attaching a material to a face of a Triforma wall/slab + attaching a Projection, I would like to edit the orientation of the projection. I can use the rotate-cirkels, but after I've rotated, the map jumps back to it's original setting, same behaviour exist with the move and scale functions... When trying this out on a simple Solid, it works as it should. 

Does anyone else noticed this behaviour?