I got a bit curious and had a play. If the reference group is generated with you add the field to a table, then it should work.
Is this what you are seeing?
Is the dialog also broken? I.e. can you see the reference group.
My best guess is that it's either a cache issue, or a full compilation of the model is needed.
These are my example classes:
Under review
Thank you for your reply! To ensure a great experience for everyone, your content is awaiting approval by our Community Managers. Please check back later.
As AI tools become more common, we’re introducing a Responsible AI Use…
We are honored to recognize Pallavi Phade as our Community Spotlight honoree for…
These are the community rock stars!
Stay up to date on forum activity by subscribing.
André Arnaud de Cal... 684 Super User 2025 Season 2
CA Neeraj Kumar 588
Martin Dráb 542 Most Valuable Professional