when I use the swipy, and then assign te Group on to a fader excutor. It does make a "groupmaster" but you can't do anything with it. Even when changing options in the group or executor itself. I spottet this 2 days ago in the latest version (1.4.0.2) of GRANDMA3 OnPC, and it is very anoying. Testen it on version 1.2.x.x and it worked. So it looks like a bug to me, but don't know
Rik E.