YA sims spontaneously turn into urn with no grim reaper or death scene

@pollylaua Did you check if any setting on MCCC could be responsible for it ? If you have a backup, I would load that. It's really impossible to tell what was the cause and if it was mod related unless you recreate it on a modless game.

I know OP said they haven't used mods but they haven't come back either and for the it was an NPC so yours might be different.