Enable Improved Caching of Org Schema (Previously Released Update)
Where: This change applies to Lightning Experience and Salesforce Classic in Enterprise, Performance, Unlimited, and Developer editions.
How: To apply this update, from Setup, in the Quick Find box, enter Release Updates, and select Release Updates. Then select this Release Update.
Why: This update fixes known bugs by improving internal systems that define and cache org schema, including standard objects, custom objects, and their fields. The documented behavior of your org’s schema remains unchanged. The update fixes bugs where the documentation doesn’t match the known behavior. This update also resolves rare, intermittent cases where undocumented object types are visible in Apex describe result methods or where version-specific schema details are improperly reused.