Microsoft have released a cumulative update for the Windows 10 May 2019 Update. KB4507453 takes the build to 18362.239 and it includes a number of fixes for Windows Mixed Reality users as well as other security fixes.
One of the issues with Windows Mixed Reality and the May 2019 Update is that after connecting your headset the world through the headset is at an angle which is very disorientating and this update fixes that problem. Also fixed is a blurring of the display when using SteamVR which made SteamVR games look out of focus when using them with Windows Mixed Reality. If you are Windows Mixed Reality user this update is well worth installing.
Here are the changes with the update:
Addresses an issue that may cause BitLocker to go into recovery mode if BitLocker is being provisioned at the same time as updates are being installed.
Addresses an issue that may cause Mixed Reality users to see a tilted world after connecting their headsets.
Addresses visual quality issues some users may have seen with Windows Mixed Reality (WMR) headsets and Steam®VR content.
Security updates to Windows Wireless Networking, Microsoft Scripting Engine, Windows Server, Windows Storage and Filesystems, Windows Kernel, Microsoft HoloLens, Internet Explorer, Windows Input and Composition, Windows Virtualization, Windows App Platform and Frameworks, Microsoft Graphics Component, Microsoft Edge, and Windows Cryptography.