Ghosted mode issue

Anyone know how to get rid of the black outline in ghosted mode? Can’t seem to find the setting.
OK, I can get rid of it but only by setting all the surface edges to 0, which is no good. This black outline seems to be describing the negative space between the objects rather than the object edges (e.g. where the ‘L’ shaped thing sits behind the object on the right, there is a break in the edge of the foreground object.

Hi Tone - I see that here as well. I’ll try to find out where that went wrong.

EDIT: Breakpoint found and reported as RH-57295