My eyes burn! It should work if you’re not letting people join while game is in progress and you disable spawn limit but I think a dynamic method would suit more.
Anyway, I’m not sure how to fix your issue but since I don’t use the round_settings_device to end rounds in my map I guess it’s not working, if your map is not FFA, you could use the team_settings_and_inventory_device.TeamOutOfRespawnsEvent() instead, it should be way easier. And you can call team_settings_and_inventory_device.EndRound() to choose the winning team.