It's only a surmise but maybe your machine had already been flagged for the update prior to the withdrawal of KB4056892 for affected AMD systems. The exact timing of the withdrawal is not stated.
In my experience its not really a big problem, after three failed boots the update was auto-reverted and my machine was again usable, as before.
Then, I took two actions to suspend it. Firstly I logged in as admin, and changed the Windows Update 'Advanced Options', to pause updates for 35 days. This is only available on 'Pro' or better. I also used 'wushowhide.diagcab',
to remove KB4056892 from the queued update list.
I've not tested it, but folk on 'Home', may find the second option is sufficient on its own.
It did not try to install the update this morning when I turned on my computer. It think it happens yesterday because their were other updates pending.
This the one awaiting restart.

Installed updates is a mess. Note it shows the bad update installed and restart a restart to finish installing it. That is the 6th time it tried installing. I think the one that says installed should be uninstalled since I had a uninstall pending restart.

Another one that installed yesterday.

I don't think I can uninstall the available update but can uninstall the one shown installed and the one not finished.
Not sure how to use "'wushowhide.diagcab". Tryed command promt but it failed to run. Not that famililar with doing such commands.
Thankis for the help