Matchmaking strangely worked

Hello

I have an issue that players were strangely matched by FlexMatch. 2 players who told Matchmaker to join a dedicated server as Monster should have joined different lobbies because only 1 Monster can exist in a dedicated server. Unfortunately, they joined the same lobby in a dedicated server.

This is “teams” in a matchmaking rule but I replaced the actual names with Hunters and Monster.

"teams" :
[
    {
        "name" : "Hunters",
        "maxPlayers" : 4,
        "minPlayers" : 4
    },
    {
        "name" : "Monster",
        "maxPlayers" : 1,
        "minPlayers" : 1
    },
    {
        "name" : "Spectators",
        "maxPlayers" : 5,
        "minPlayers" : 0
    }
],

I’m sure they requested their matchmakings as Monster but they joined the same lobby in a dedicated server.

  • Player1
    PlayerSessionId : psess-223f54c7-8988-47a9-9f25-2b246877cbd8
    MatchmakingTicketId : 5f74b9c33fccdb0d10541709-19-5-10-8

  • Player2
    PlayerSessionId : psess-da7b42e0-a143-4ba8-b467-e227f7c41c72
    MatchmakingTicketId : 5f74bb6eab5ce9151700f054-19-3-50-3

Could you tell me why they joined the same lobby as Monster?