I asked about the filter because if the data is migrated in some what that does not preserver the Term and Taxonomy/Term ID values then it could be that they are different on the two sites and this would cause an issue.
I cannot reproduce this issue when testing, so I haven’t got a clue what it could be. My best suggestion at this point would be to open a new support ticket https://support.advancedcustomfields.com/new-ticket/
