Originally posted by DredSilent:

Game just sometimes does this on reload. Always has. Possibly a fireplace or torch went out, a wall got shifted and doesn't think its part of the room anymore. Any number of reasons.

Any single one of those shouldn't cause a drop from 23 to 16, but yeah. For me it's usually the hot tub, but in this case it's the PT update that makes rugs to not stack their comfort effect anymore, just how it works for other furniture "classes". It's a sensible change, but I don't appreciate the loss in duration of the rested bonus much at all.