Microsoft acknowledged a new issue leading to intermittent issues when printing or completely breaking the printing capabilities of Windows devices after installing cumulative updates issued during late September. A workaround is already available for this known issue while Microsoft is still working on a resolution that will be provided to all affected Windows customers as part of an upcoming release. Windows 10 version 1903 is now the broad deployment channel which makes it available to everyone via Windows Update. Microsoft announced that all users will now be able to see the Windows 10, version 1903 release being offered in Windows Update unless their devices are affected by hardware compatibility blocks.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-1903-kb4522016-cumulative-update-breaks-printing/