[Group Command BUG] [MAC] Rhino 6.30.20287.07362, 2020-10-13

This is to bring to your attention another bug on this version. I was copying a GROUP of poly surfaces. When suddenly I realized rhino starting copying only some parts…

Very annoying, this can be dangerous when manipulating complex geometry when we can not easily see this problem !

Screen shot of the grouped object.

Screenshot of the error :

Can you post the file with the grouped object so someone can test?