I actually have a use case where this is the desired behaviour.
Currently there is a group who have the moderator status in the back end, but they aren’t actually doing moderation. So I don’t want them listed in the moderator section on the about page.
However I do want to list them as a group on the about page using this theme component.
So if you were ever going to change the behaviour, I would suggest a test to see if the group being added to the about page is included in the hidden list. If the group to be added is also hidden, then the hiding should be ignored.
However if it wasn’t, then as far as individuals are concerned, if they are in a hidden group then should be hidden in the display list of any other group.
Not sure if that makes sense or if that would be the best implementation.
Thanks @awesomerobot for this great component!!