Is the staging site identical to the live site? So if you’re using get_field and it has a page/post ID, it’s the same in both environments?
Do other fields work on other pages? Are you able to share your code for others to look?
Have you flushed the cache within the Siteground account? Not just at the WordPress level? I think I once had similar and had to do a master flush (or whatever it’s called).
