Hi Elliot,
It didn’t work because I still needed that function for the content area, so I needed an additional function.
I found a link on your old forum half an hour ago that solved all my issues
http://old.support.advancedcustomfields.com/discussion/2613/how-to-disable-auto-p-tags-in-wysiwyg-editor
I was getting p tags around images, and shortcodes – causing lots of errors.