Blocs V5 - blocs custom class right margin glitch

When creating a custom class for a bloc and setting the right margin does not work.
Left, Top and Bottom margins are working and can bee seen in the preview, however the right margin does not change.
Here are the settings for all margins:

And here is the result in preview:

As you can see the second Bloc #2 right margin is not indented from the right.
This worked in Blocs V4.