Adding participant Zois to public/community properties is currently bugged. From my experience, if I add participant Zois to a property, they get culled at 8:00 AM if they haven’t met the played Zoi by then. I really love this experimental feature so this is very disappointing.
The Scheduled Day buttons never lock in, either. I had all weekdays set to on (blue) and when I checked it again they were all switched off.
Additionally, when they do spawn, they usually show up with a different body type than what I created them as. I do not want NPCs to spawn with randomized body types, I want them to look exactly as I created them originally.