Same here. The problem is with 18.104.22.168. Rolled back to 5.1.8 and it works again.
In my case here’s what happened:
– I could use “Screen Options -> Show on Screen” to reactivate an ACF meta box.
– That would work for the specific page
– If I navigated to another page and reactivated its meta boxes, meta boxes for all other pages would disappear again
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users