The leaderboard of players on the tab menu does not add new players as the game goes on. When I host, everyone who is present on the ready up screen is on the leaderboard all game. Nobody else, though, even though many join after. This includes the post-round score screen.
The 1st/2nd/3rd HUD element behaves as expected.
Consistent with every lobby I have joined.
Players to be added to the leaderboard as in other gameworlds.
Only players present on the ready up screen, or when I join late, are on the leaderboard/final results screens.