I have similar problem. I have a form, and a function processing it somewhere in the page (usual way, no save_post or pre_save_post).
After adding acf_form (with form=>false, it’s only for 2-3 fields) i’m getting empty $_POST array printed on my page, without acf_form, everything works properly.
There is some kind of redirect issue, but i don’t know how to stop it from redirecting, should i do something with acf/save_post?
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