In ACF_Rest_Api class, rest_pre_dispatch filter is used.
Currently, this filter does not return the $response, so even if a response is previously defined in another plugin, it will be ignored.
I think adding return $response; to the initialize method.
Hi,
I worked around this issue by lowering the priority of other plugins.
However, I think it would be good to avoid losing $response, so I would appreciate it if this could be improved in the future.