been trying this for a week already. It seems the stealth detection part never worked - there are several times I can see marked enemy cloaking and disappearing in front of me, and when they appeared again, the buff was still there.
i have my main house (grand topal hideaway) listed in the housing tours, it has multiple target dummies, scribing altar, and grandmaster stations (in progress being filled out), as well as almost every antiquity furnishing on display to preview them