I have noticed as a client has flagged it up recently but custom fields do not show on the wordpress post preview page, they display fine if the post is saved and then viewed from the front end of the website but in preview mode no custom fields display any values. Is this a known issue and is there any work around to getting this to display?
I have same issue :/ ACF revisions doesn’t work with posts draft when
support => ['revisions'] is added to register post type array. When I remove this support, then I cen see preview changes on draft but not on published post.