The new merge group functionality works poorly with duplicating objects and any other operation where Blender might just copy the merge group index from one object to another, since the object then never gets added to the merge groups internal list of members and thus all sorts of things break (Deleting merge groups, exporting) since it relies on this list being accurate.
Describe the bug
The new merge group functionality works poorly with duplicating objects and any other operation where Blender might just copy the merge group index from one object to another, since the object then never gets added to the merge groups internal list of members and thus all sorts of things break (Deleting merge groups, exporting) since it relies on this list being accurate.