Microsoft has released the KB4517211 cumulative update for Windows 10 1903 (May 2019 Update) It introduces a variety of quality improvements and bug fixes. This update comes with a fix for an issue audio issue in games that was introduced earlier this month in the Windows 10 update. Other notable issues that were fixed in this build are ones for VPN disconnects when on cellular networks, upgrade issues due to older display drivers, and display problems for laptops with built-in HDR screens. The latest build of Windows 10 is advanced to 18362.387387.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-1903-cumulative-update-kb4517211-fixes-game-audio-issues/