Still have the problem although I have decided to dump this file that is corrupt in some way.  But first I removed the Room Set and just retained the figure.  Removed the floor and kept the default Ground.  Now when I select the figure's body and use my Main Camera Y rotate parameter, it's the default ground that is rotating - not my Figure.

Ho Hum.  Good that I wasn't tempted to dial up any other clones in case this is a medical problem  LOL and all my V4 clones have a heavy cold.