It might be wasteful to vote off a player if they're just not checking in.
That is assuming that they are not doing it as a strategy, laying low for one reason or another (wolf playing it cool or seer trying not to draw attention). If they're just not involved, I would guess they may just be a vanilla villager... or plain and simply just got held up.
Still not sure who I'm suspicious of, but there were some weird votes yesterday, though maybe it's normal for this board