So the issue is that if there are ACF fields on the page that the other plugin isn’t redirected?
Or are you just trying to hide the content in the acf fields?
Sorry, I’ve never used this plugin, but if it’s supposed to be redirecting if a user is not logged in then there’s nothing that I know of in ACF that would cause that to stop functioning. If you’re trying to hide only specific content on a page, then it should be hidden using the methods you’ve listed.
Let me know if you hear anything.
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