If a player uses the combat view on a monster duel in the arena, the winner of that duel stays there until the player leaves the zone. That is, the individual player sees the winner stand there forever, but others who didn't use combat view see them vanish as normal. At least that's my understanding from asking around.
Update: Turns out this only happens if the player uses spectator view from so far away that the duel circle is technically not loaded in. (In this case, the lobby where the kiosks are.)
