Working on a long and complex form. I'm trying to group my stuff to find it more easily.
One such example is a group of calculate questions:

If I save the form as it is, I get an error message because the group has no children.

Well, it does; there are 12 calculates right there.
The error is maintained even if I hide the group.
Adding a hidden text question fixes the problem. So clearly, the issue is not having questions that don't show up; it's having only calculates.
Please change this behaviour.