I think I’ve got a new one ...
in short: all the new shinies ...
I can load Genesis (and it isn’t any slower than loading the Morphs++, A4, S4 and so on, on a V4).
I can see Genesis in the viewport.
I can load hair and clothes (materials have to be applied in from the Poses or Materials folder).
I can pose and morph Genesis.
Render: clothes and hair are visible, Genesis turns invisible.
Yes, I looked at the Parameters tab: visible in raytracing, visible in camera, visible, visible, visible! are checked.
OK, it was a halloweeny render and maybe Genesis decided to play ghost, but ... I don’t think it should do that.