[Risolto] Advanced Custom Fields Multilingual

Background of the issue:
I am trying to edit field labels across languages on my site link nascosto using WPML and Advanced Custom Fields Multilingual.

However some fields seem locked and I am not able to translate them.
Here is a short video to show you what i mean: link nascosto

Could you kindly help please?

Symptoms:
I can't edit field labels across languages.

Questions:
How can I edit field labels across languages using WPML? I followed the documentation but some fields appear to be locked.