I was looking through the code of ACF to see if there was some performance reason for why it does not sort the values into display order. I can’t find any reason since ACF calls get_field_object. The only extra overhead is the shorting process. It could be that it’s just something that was never thought of, or there could be some other reason that I’m not aware of. In either case, a support ticket would definitely be your best way to get the developer’s input on it. For all I know this is already on a “to do” list and other things have priority.
