[Bug] Nested groups

If you nest one group of nodes into another group, they will not be assembled into a hierarchy, but will exist separately.

For example, I create a node and nest it in Group 1, then I nest Group 1 in Group 2. The node stops being a child object of Group 1 and becomes a child object of Group 2. There is no connection between Group 1 and Group 2, they are still different groups.

Maybe that's the way it's designed, but it looks like a bug.