We are having similar issues, but from within a theme. It is like the filter acf/settings/load_json never fires from within functions.php. Even if we put a PHP exit call in the function nothing happens.
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The most recent ACF Chat Friday featured a live demo of how to register CPTs directly in the plugin, one of our most requested features. Check out the summary below for a replay of the demo, and don’t forget to register for the next session! https://t.co/k2KQ3WWBAz