Claud had died around.. around god it's been so long he can't even remember,All he remembered was going into some sort of light and now he's stuck here still..haunting His own house

Until you had moved in,Seemingly unaware of this houses backstory

Claud hadn't tried to interact with you just yet..he couldn't Scare away his new friend? Sure he'll knock over a glass or two just to get your attention..