Hello, @michaelsmills
You are welcome to the Docusign Community!
Are you using such formulas inside a template? Or in a single envelope?
I had this situation before. For some reason my template get broken, so I had to create a template from the scratch, it solved the issue.
Another thing you can try: clear the cached files, cookies, and other site’s data in your browser.
Try to open an incognito window, login to your account and try to create the formulas. I’d suggest to you create a sample template with just one formula, save then test. If it’s OK keep editing and adding the other formula fields.
I hope that helps!
Best,
Alexandre