Sometimes upon start-up the start button does not respond when clicked or via the keyboard start button. The only way to fix is to hard reboot.
Windows Version 1903 OS Build 18999.1
@HotCakeX Thanks for getting back to me. I'm unable to update as I'm unable to successfully restart to apply the update RE: Can't Restart or Shut down my PC- Windows 10 insider build 18999 Fast Ring - https://techcommunity.microsoft.com/t5/Windows-Insider-Program/FIXED-Can-t-Restart-or-Shut-down-my-P...
I've tried force restarting using shutdown /r /t 1 to no avail. I'm just going to admit defeat for now and roll-back to a stable build.