Thank you for your patience! Skuid has fixed this issue, “UI-Only Formula fields not available in Component Display Logic” (issue CORE-3057) in the 12.4.10 release which is available on the Skuid Releases page.

Best practices for upgrading can be found in Upgrading Skuid on Salesforce. As a reminder, Salesforce does NOT allow reverting back to prior versions of managed packages. Skuid always recommends installing new versions in a non-business critical sandbox environment to test all mission critical functionality before installing into a production environment. We also recommend that you update out of date themes after you upgrade. Please let us know if you continue to encounter any problems with this issue after upgrading.

Thanks again for alerting us of this issue!