Microsoft resolved a Windows 10, version 1903 known issue in the KB4522355 cumulative update released yesterday. The issue would prevent devices with some Intel and Broadcom Wi-Fi adapters from using any wireless connections. Microsoft also addressed an issue that was causing the Start Menu, Cortana search bar, and tray icons to stop responding or to display a critical error. It also comes with fixes for Windows 10 hanging at the sign-in screen or for a black screen shown after installing updates. The known wireless network issue resolved today was acknowledged by Microsoft on September 13.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-fixes-windows-10-1903-network-issue-update-block-stays/