Windows 10 1903 users have started reporting boot, printing, and Start Menu issues after installing the KB4524147 cumulative update that go away once the update is uninstalled. Microsoft has not acknowledged any of these issues as of yet, but the amount of reports indicate that there is something going on with this update. The reality is that this update is a hot mess of confusion, the description of what it fixes was worded poorly, and nobody has any idea whether this is a cumulative update with a security fix or primarily a security update with non-security fixes.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-kb4524147-update-may-cause-boot-and-printing-issues/