I have something simmiliar.
1) I created a few pages with acf fields.
2) I generate json file with this fields group.
3) I clean database and then create programically pages (with same names and slug thats before).
4) I import acf fields from json file.
5) I go and edit some page – i can’t see acf fields.
6) I must edit acf fields group and click Update. Now i can see fields on page edit.
This is issue?