I have found a bug in Advanced Custom Fields Multilingual addon plugin.
Specifically: on option pages, the fields with translation preference copy once are not able to save/keep empty/falsey values.
I have opened a ticket here and you can find a detailed bug report AND a solution proposal there: https://wpml.org/forums/topic/acfml-bug-report-copy-once-fields-on-options-pages-admin-reload-issues-with-falsy-empty-valu/#post-17745347
This is a major lapse in how "copy once" logic is implemented and is especially frustrating, because that setting is apparently the only "valid" way to make fields on option pages translatable.
Supporter Andreas W. has refused to study the report and kept "supporting" me on unrelated issues, then rudely closed the ticket (I cannot even see it my past tickets).
My main goal with this ticket is to offer a solution to a legitimate bug in the logic of the Advanced Custom Fields Multilingual addon.
How do I contact technical support? I am not interested in non technical admin chat especially not with someone, who is not able to listen.
