By the way, i presume your example says field instead of fileId due to some autocorrect thing?
Thanks for the question, hope we can get it sorted out for you!
Sorry for the late reply. Yes, you are right on my screen it says "field" and not "fileld". I believe I'm using version 21.x. I'm thinking that this is not a bug but rather has something to do with me putting the WYSIWYG editor in HTML mode, and the picture plugin being in Wiki Syntax (which wouldn't work in HTML mode). I believe this because the plugin works in the Wiki-syntax WYSIWYG editor but not the more user-friendly HTML. Do you have any suggestions/ideas?