What code is used to get the image field where you get the string value?
ACF stores the ID of the image in the database, not the image data. Only the ACF field settings allow ACF to return an image object. If you are using get_post_meta() then you’ll only get the image. I’m guessing that you are supplying a field name to the WP Post Distance Filter?
Will need more information about the code that gets and displays the value.
