Since when is inheriting a generalization not required for all specializations?

Hi all   I think I missed some updates of Mendix, seen I today noticed that inheriting a generalization object is now not required for all the specializations of that object. B and C are specializations of A. When using an inheritance splict i see that I dont have to capture all unused specializations (non-empty) C in a merge.. Anyone an idea of the update or is this a bug? seems a bug to me ...since it was required in all earlier versions.
1 answers

I wouldn't say that this has always been as such... but it's already working that way quite some time.

What you need is one path for the generalisation.