I tried changing the field to ‘text’ and I had the same issue – it would not store data. All other fields work OK.
I’m on Custom Fields version 5.8.9
The field that is not saving was the first field I created.
I can write data direct into the database and see it in my post. But if I edit the data and update the post, the data it disappears.
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users