I can confirm two things:
- the bug still exists in the current version 5.8.2
- the bugfix above (change some code concerning menu_order in acf-field-group-functions.php does not work either
The JSON file is in the correct order and the acf fields while editing a page are also in the correct order but when I want to edit a field group all fields within the field group are being randomly reordered (always the same fields are affected) and this state will be written into the json file on save.
This is a very huge problem because editing ACF fields is just unusable right now. Having to reorder multiple fields after changing one property is really slowing down our workflow.
