The same issue has been happening to me as well. Both shaded and realistic visual styles have no visible orthocube. The only way to see the orthocube in these two visual styles is to select the orthocube. From this point, I can make basic dimension changes to the orthocube by clicking the grips. However, I can't add jogs. The moment I hit "Add Jog", the orthocube is deselected and disappears once again. For me, the orthocube is only *fully* usable in 2d wireframe, wireframe, x-ray, and shaded with edges. Conceptual, hidden, shades of gray, and sketchy show the cube but obscure anything inside of it.
I'm guessing that the developers have only focused on wireframe visual styles for orthocube generation (?), although I could have sworn that a few months ago I had no issue making orthocubes in the shaded visual style. The only thing I can suggest to do is use "wireframe" to create orthocubes even though it makes view rotations/orbits/pans a pain.
