In an article forms, I have a GroupX and a Editor Wysiwyg field. If I use the Tiny Editor of Joomla all work fine. If I use JCE Editor, I can't add new Item into the GroupX. Button ADD don't work. I have encountered this defect with french current version of Joomla (3.6.5) and JCE (2.5.31). It is not blocking for me, I can for the moment use another Editor than JCE.
As JCE is a popular Wisywyg éditor, I hope than this information can help somebody and perhaps will be corrected into futher version of Seblod.