https://www.bleepingcomputer.com/news/microsoft/windows-10-insider-build-18317-released-and-breaks-wsl-again/

Windows 10 Build 18317 is rolling out to the Insiders enrolled in the Fast Ring with improvements, fixes, and its own set of known issues. The latest update to Windows 10 19H1 separates Cortana from search, improves the Windows Insider page and addresses the reliability of Start.

Windows 10 19H1 Build 18317 is another preview release intended for developers and beta testers, and it should not be installed on primary devices. Microsoft warns that the update may contain unexpected bugs that might be painful for some users.