Hi,
I have been using ACF with cornerstone for some time by pulling custom fields for the current post using {{acf:fieldname}} tags in my content. This has worked fine in previous versions of PRO (I am currently using ProVersion: 2.3.8) on my site.
However once I upgrade to the current version this breaks and all the content simply shows nothing or only the code {{acf:fieldname}} in live view. I can still see content displaying in cornerstone previews.
I was excited about using the new Pro capabilities inserting dynamic ACF content through cornerstone with global block but this has the same issues. Followed the steps about creating this type of content shown in this instructional video but having this same issue. I have been forced to roll back to the older version of PRO to allow the site to function for the time being.
I noticed a post about this from Mar 2019 is this something that has been fixed.
Thanks
Eric