Super weird behaviour… 🙁
I added a new custom field, and move it to the top of the list in the field group.
When doing so, all field names changed to this weird json:
What the heck is this? 🙁 🙁
Did I loose all my fields names?
I am trying to change the field names manually, but when I edit and save, the new value does not save!!! 🙁
And it remains with the previous, weird json value
There is something on the site interfering with ACF. Either another plugin or something in your theme. You need to deactivate plugins and change themes to find what is causing the issue.