Hi Elliot,
I’ve been looking into this issue again this evening.
It appears to be caused by this ACF extension which you mention on your extions page: https://github.com/stormuk/Gravity-Forms-ACF-Field/
This thing is causing havoc and ACF will not work correctly as soon as I add a gravity forms field to my field group. You might wanna look into that.
Thanks,
Marcoevich
