Out of band OPTIONAL Microsoft Windows versions 1903 & 1909 update/fix released February 28, 2020

 Some users were adversely affected by some patches/updates applied on February's Patch Tuesday update.
 A optional update   KB4535996 was released. As it is optional you may need to search Microsoft's sites or use Windows Update to find this fix.
 Fix, did i say fix?

Here is what is fixed in the new update:

• Fixed a speech platform issue that prevented it from opening in "high noise environments".
• Fixed a Windows Mixed Reality home environment issue that reduced the image quality.
• Fixed a PeerDist-encoded content issue in Internet Explorer and Microsoft Edge.
• Fixed an ActiveX issue that might prevent it from loading.
• Fixed an issue in Microsoft browsers that might cause the browsers to bypass proxy servers.
• Fixed an issue that could prevent Centennial apps from opening.
• Fixed an issue that prevented the installation or upgrading of UWP apps in some situations.
• Fixed a Microsoft Narrator issue that caused it to stop working if a user session exceeded 30 minutes.
• Fixed an update issue that caused an unwanted keyboard layout to be set as the default after upgrades or migrations even if it was already removed.
• Fixed an unmentioned issue when editing MOV file properties.
• Fixed an issue that caused usbvideo.sys to stop working after a device resumes from Sleep or Suspend after using the Camera app or Windows Hello.
• Fixed a Group Policy issue that caused the policy "Allow uninstallation of language features when a language is uninstalled" from taking effect.
• Fixed a Windows Search box issue that prevented it from "rendering fully in the space allotted for it2.
• Fixed an Input Method Editor issue that prevented the use of the user dictionary when "leveraging folder redirection with user profiles".
• Fixed a Windows Search issue that prevented it from showing results.
• Fixed an issue that caused the Windows installation to stop responding on a VMWare guest machine wit a USB 3.0 hub.
• Fixed an unnamed Windows Autopilot self-deploying mode and white glove deployment issue.
• Fixed a PowerShell workflow issue that might make these fail with compilation errors for long sessions.
• Fixed a product key activation issue in a user's Managed Service Account in the Windows activation troubleshooter.
• Fixed an issue that caused applications deployed using the Microsoft Installer from being installed using the mobile device management platform
• Fixed an "unknown username or bad password" error when attempting to sign in in an "environment that has a Windows Server 2003 domain controller (DC) and a Windows Server 2016 or later DC".
• Fixed an issue with sign-in scripts that caused them to fail to run.
• Fixed a data collection issue with isTouchCapable and GetSystemSKU.
• Fixed an issue that caused AAD joined systems to rejoin the AAD domain.
• Fixed an issue with the WinHTTP AutoProxy service and the maximum Time to Live on Proxy auto-configuration files.
• Fixed a printer selection issue in the SQL reporting service that caused the wrong printer name to be selected.
• Fixed a printer user interface issue that prevented it from being displayed correctly.
• Fixed a Network Profile Service issue that might cause the computer to stop responding.
• Fixed an issue that could cause some applications to fail to print to network printers.
• Fixed an issue that caused some printers to be a hidden device in Device Manager.
• Fixed an issue that caused Host Networking Service PortMapping policies to leak.
• Fixed a stop error that occurred when mounting Resilient File System volumes without a physical device.
• Fixed an Open Database Connectivity issue that caused an infinity loop.
• Fixed an issue that caused the Local Security Authority Subsystem Service to stop working and to trigger a restart of the system.
• Fixed an issue that intermittently generated Online Certificate Status Protocol (OSCP) Responder audit event 5125 to indicate that a request was submitted to the OCSP Responder Service.
• Fixed an issue that caused queries against large keys on Ntds.dit to fail with the error, “MAPI_E_NOT_ENOUGH_RESOURCES”.
• Fixed a log corruption issue when a storage volume is full.
• Fixed an unnamed error that caused _NFS4SRV_FILE_CACHE_ENTRY and DirectoryCacheLock to stop responding.
• Fixed a Server Message Block Multichannel issue that prevented it from working within a cluster network that has IPv6 Local-Link addresses.
• Fixed an issue that could cause Storage Migration Service inventory operations on a Windows Server 2003 source computer to fail in clustered environments.
• Fixed a timing issue that could lead to the stop error 0x27 in mrxsmb20!Smb2InvalidateFileInfoCacheEntry.
• Fixed an issue in the Storage Migration Service that caused the Cutover stage to stop working during migration if an administrator assigned a static IP address to the source adapter.
• Fixed an issue in which canceling a deduplication (dedup) job to rebuild hotspots prevented other deduplication PowerShell commands from responding.
• Fixed a Remote Desktop session disconnect issue.
• Fixed an issue that made Windows Defender Application Control's Code integrity-based events unreadable.
• Fixed a certification issue that caused Internet Explorer mode on Microsoft Edge to fail.
Improvements:
• Battery performance during Modern Standby mode improved
• Improved Event Forwarding scalability to ensure thread safety and increase resources.
• Improved Urlmon resiliency when receiving incorrect Content-Length for a PeerDist response.