Matchmaker Matched not returning a match

[celioreyes]

Prototyping a flutter app using nakama and when I try calling matchmaker between two client like so:

final matchmakingTicket = await NakamaWebsocketClient
  .instance
  .addMatchmaker(minCount: 2, maxCount: 4, query: "*");

                    
NakamaWebsocketClient.instance.onMatchmakerMatched
  .listen((MatchmakerMatched event) {
      print(event);
      //NakamaWebsocketClient.instance.joinMatch(event.matchId!);
  });

event.matchId is always an empty string even though it's "matching"