I am getting problems trying to use the Black Studio TinyMCE Widget in Page Builder.
The TinyMCE Widget doesn't seem to save paragraphs or breaks, also any media added is not saved. Almost like not have the rich editor at all.
The layout is a little strange too with the tabs at top, it is a little odd, and always defaults to html view.This is how it looks when opened up http://kumakirin.com/junk/page1.PNG
This doesn't seem to be an issue with the TinyMCE Widget because when you use it on the widget page, it is styled and saves correctly.
Page Builder by SiteOrigin
Black Studio TinyMCE Widget