CONNECT - Modifying multiple handles in 3D not working

I want to select the 3 handles and move them downwards simultaneously. 

I see that it is possible in 2D (https://communities.bentley.com/communities/other_communities/askinga/w/askinga/799/modify-handles-for-multiple-elements).

Is it possible in 3D as well, or do I have to move each handle individually?