Is this a bug?
Yes that it is a defect of Algor Simulation against 3D Connexion Space Navigator. It has been logged into Autodesk defect system #1326015. We will look into this issue soon.
Algor Simulation QA
This solution from 3Dconnxion through their facebook page: Set the visual style to anything other than 2dwireframe. So now I'm using plain wireframe when working in top view and no cancelled commands when panning or zooming. Awesome!!! Just make sure nav cube and nav bar are on.