I'm playing around with some custom fields in our Sandbox Preview environment. I created 4 custom fields in a project-based custom form. I'm now attempting to create a calculated field that uses those 4 custom fields. In the past, I know you had to save/close out of the form and reopen it before newer custom fields would show as available in the Calculation Editor. I've done that several times now, and I've also refreshed my browser, but the fields do not appear.
Is this a problem with the new form builder? With the test environment? How long does it take for these fields to become available?
