Thanks @elliot
I had done another extensive project with ACF5 and I think was making a few assumptions on handling of post update/insert.
Aside from reverting back to ‘post_id’ => ‘new’ on the acf_form call and the pre_save_post, I changed the $_POST[‘return’] to $GLOBALS[‘acf_form’][‘return’] and it looks like we’re back to normal.
As always, thanks for your time and an excellent plugin.
