https://www.bleepingcomputer.com/news/microsoft/disabling-windows-10-experiments-blocks-known-issue-rollback-fixes/

As Microsoft begins to utilize its Known Issue Rollback feature to release Windows 10 fixes quickly, users are discovering that modifying privacy settings may prevent these fixes from being installed.

Microsoft routinely conducts experiments with Windows 10 users to determine if a feature is commonly used, if a change in a feature makes it more useful, or to introduce features to a small test population.