for me it was solved when replacing acf+plugins with the ACF Pro. The duplicate option appeared again for the field groups, but I had to make new duplicates. The connections made before was gone.
I have almost the same problem.
I used to have a ACF field group and a copy of that in another language.
Now the language options suddenly are gone in the settings of the ACF group and both groups appers in posts. But just one of them saves changes I make.
What has happened? Are all my data lost for the translated ACF Group?
Wordpress 4.0 + WPML + ACF
