I did some testing on my Win 10 box and I had selected to Notify for Scheduled Restart when updates are completed installing. I had set my own preference schedule, for example 18:45 today (which was in fact yesterday).
Anyways, I ran the Check for Updates and when the installation had finished, I waited until my set time was reached and computer did not reboot automatically. Why is this? Does it in fact have to reboot automatically everytime I set my own time to have the computer restart after the updates had completed?
I have the very latest build.

I don't understand.