Apparently if you use TeleportService to batch teleport a group of players where 1 player has blocked another player, they will get teleported to different servers (or something? I’m not super clear on exactly what happens and testing this is a massive pain).
There is 0 mention of this behavior on both the TeleportService page and the Teleporting between places page. This behavior would be good to know about, particularly in the case of building matchmaking systems. Clear information about how exactly it works would be much appreciated.