Following on from the patching issues list in September 2019 here, KB4517211 was released several days ago with several fixes for issues with Windows 10 1903.
I know this because I experienced quite a few of these issues while travelling recently.
Fixed:
Audio in games is quiet or different than expected
Microsoft has received reports that audio in certain games is quieter or different than expected. At the request of some of our audio partners, we implemented a compatibility change that enabled certain games to query support and render multi-channel audio. Due to customer feedback, we are reverting this change as some games and some devices are not rendering multi-channel audio as expected. This may result in games sounding different than customers are used to and may have missing channels.
App-V Application Network Failure Error
Addresses an issue that prevents a Microsoft App-V application from opening and displays a network failure error. This issue occurs under certain circumstances, such as when a system’s battery is low or there is an unexpected power failure.
VPN Disconnection on Cellular Networks
Updates an issue that may cause you to disconnect from a virtual private network (VPN) on cellular networks.
A full list of resolved issues can be found here:
https://support.microsoft.com/en-au/help/4517211/windows-10-update-kb4517211
This KB is available through WSUS now.