We have the same question but this is a 2nd violation already listed, maybe let's ask the organizers, why would they allow a player to leave the venue?
That's the question need to be addressed and I think organizers are also at fault here not doing their parts.
I think being a security staff, they are also fan of the players so they just allowed it to happen as a favor given to their idol.
I don't think they have to do that besides they are paid to do their jobs rightfully and if the higher-ups told them what their jobs are then they should have abode on it, they should set aside idolizing for a moment than breaking the protocols because they may be sanctioned as well.
By the way, what can you say about this article?
https://www.espn.com/nba/story/_/id/29456878/nba-restart-x-factors-eight-players-big-questions I think he has some good points there. Check it out.