https://wccftech.com/windows-10-kb4598291-builds-19041-789-and-19042-789-preview/

Microsoft released January 2021 "C" optional updates for Windows 10 last month. However, Windows 10 October 2020 Update and the May 2020 Update didn't receive this update. The Windows maker has today released KB4598291, a "Preview" update that is optional and focuses on quality improvements. The update is also available for Insiders in the Beta and Release Preview Channels.

Updates an issue that causes a device to stop responding when you play a game in full-screen or tablet mode.