ok so i run a small a space colony sim server on a Docker container. After today's update, SteamCMD fails and players see 'failed to update app state':

Windows Update
We couldn't complete the updates.
Undoing changes. Don't turn off your computer.
Error code: 0x800f0922
I've run the update command three times. It downloads, then fails at the end :D What am I missing?
i'm comfortable with the command line, but i'm not a SteamCMD expert. Any tips on teh right update command or logs to check would help a lot. Logs and config are available if anyone wants to see them.