When a world becomes full of users, the avatars of later joining users becomes non-functional. No toggles work except locally for the user.
So if I were to join such a lobby that was full after waiting in queue, all users that was already in the instance will see me in default state without any toggles enabled or face tracking data showing through until the world user count dips down to about 60.
Until then only I can see my own changes to my avatar and FT working as intended but nobody else will.
This happened consistantly for over a month in Just B Club during social events I've attended where lobbies are consistantly full.
When user count in the world drops down to about 60 then everything starts catching up again and stuff starts working normally for some reason.
This issue is not related to any specific avatar, but appear to happen across the users of most avatars in the world who joins late through the queue system.