I’ve tried with disabling all other plugins, the fields remain enabled. Since I’m developing my own plugin that uses ACF (and GravityForms) as dependencies, I really only have those plugins installed on an otherwise vanilla WP install in a Local machine on my Mac (using Local by Flywheel). As it is a purely dev site I’m currently just using the Twenty Seventeen theme. I can try switching themes, and will have a different theme in place (along with lots else) on the real site once my plugin is developed, but I don’t expect a default WP theme to get in the way of ACF.
