clauded I shut down from console in the past, it doesn't stay in the console to print stuff before shutting down, it just instantly goes to black screen (like normal shutdown). I do not think I would be able to read any error there.
brent sudo eopkg check
says only a font and some pngs are broken, so it's not that. watchdog
has a single line in sudo journalctl
and it's not during shutdown.
BuzzPCSOS SMART is OK on all disks ( using the Disks program )