Hi @jepser
If ACF is not correctly formatting the value, that means ACF is not able to load the correct field object when you use the get_field function.
When you save a value with ACF, 2 values are saved:
1. The values
2. A reference string which connects the value to the field object
It is most likely that the values have been saved before you changed the key. After changing the field key’s, the reference does not work and ACF is not able to load the field / format the value.
Does this sound like it is possible?
