Problem with grid on top of objects in ghosted mode

The attached Rhino file contains an nested block exploded once.
Each of the six blocks contain a cylinder created in Artec Studio.

AssemblyCAD_02.3dm (92.3 KB)

The original *.step file:

AssemblyCAD_02.STEP (20.4 KB)

I like the ‘Show grid on top of objects’ grid appearance. Something seems to be wrong with the way these blocks are displayed. Depending on the view angle or selection of objects, some of the blocks have a plane at their origin.