Hello! Congratulations on the project!
I am trying to work with clonable groups but they only show 1 single field, they are not showing the others that have been attached to them.
I noticed that this is happening also with the tabs, except that in the tabs I can not even add the fields.
I also tried to create the field group metabox using the metabox template, but I got the same result, it showed only one field.
I bought all the plugins, what am I doing wrong?