I have tried your methods, and they didn’t resolve this issue. And the fields are populating, because when I go the back end, they are there. I appreciate your time and effort John, I really do. I’ll probably submit a ticket like you suggest.
In the meantime I have figured out a temporary solution. Instead of attaching the calculations to run during the save process (acf/save_post) I have just place a call to the function right in my template at the top of the page. This is giving me the results I had expected – the function runs, updates fields, then the page loads, where I can use get_field to display the results of the calculations.
