Thanks John.
I’m using the latest version of pro.
I was calling acf_form outside the loop as far as im aware. Its a strange one. If I call acf_form() with an empty array, it displays the the fields on the page with a the contents correctly. But when I try and pick out the wysiwyg specifically, the form displays the editor but its contents are empty.
Having said that, there was an important bit of info I forgot to provide: Im running wordpress on a localhost using wamp. Does this have any bearing on how acf_form works?