https://www.bleepingcomputer.com/news/microsoft/windows-10-kb5009596-update-released-with-bug-fixes-improvements/

Microsoft has released the optional KB5009596 Preview cumulative update for Windows 10 20H2, Windows 10 21H1, and Windows 10 21H2.

This update includes fixes for reboots on domain controllers, L2TP VPN connection issues, and 25 other fixes or improvements.