Hey @shortee, I just found a thread from late 2021 which explains the fix for this:
https://support.advancedcustomfields.com/forums/topic/acf-rest-api-image-only-shows-attachment-id/
Add ?acf_format=standard to your API call. Hope that fixed your issue too.
Cheers,
Tobi
Hey, I’ve got the same issue. As it breaks my clients site completely, it’s quite urgent.
Thanks for having a look,
Tobi