More on this: - Invoking the nurbs curve tool automatically changes the view from top/plan to top.
Likewise for most of the 3d creation tools???
This explains the missing handles on some of the 3d objects, they reappear in Top/Plan view - some but not all.
eg. Sphere, Cone, still no handles
3d polygon, handles reappear when reverting to Top/Plan.
This is happening in the default workspaces, and in Layer & Screen Plane.