Not sure what is wrong with the first query. If it is returning false then it’s not finding any posts (attachments) that match. Number of posts or meta rows should not matter.
Try dumping $attachment_query
Welcome
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users
We use cookies to offer you a better browsing experience, analyze site traffic and personalize content. Read about how we use cookies and how you can control them in our Cookie Policy. If you continue to use this site, you consent to our use of cookies.