I was hoping the Hide/Show troubleshooter WUHIDESHOW.DIAGCAB tool downloaded at: https://support.microsoft.com/en-us/help/3073930/how-to-temporarily-prevent-a-driver-update-from-reinstalling-in-window
would help, but when I run it it unfortunately shows no updates to hide or show.
So for now, I guess I will have to leave my Windows Update Service stopped & disabled and hope for a fix.
I suspect that the Hide/Show tool relies on the service you have stopped.