Hi Ben, did you already see our announcement about potential performance issues in Winter’20? https://community.skuid.com/t/potential-performance-degradation-on-salesforce-s-winter-20-release
The latest releases including a fix for the issue are available on our Skuid release page. 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 We also recommend that you update out of date themes after you upgraded.