Fortnite team selector keeps changing every round and not keeping the same team

Hello, I’m trying to create a zone wars map in Fortnite (4v4) I want to make it so that once the game starts the players can select what team they can join (team 1 or team 2). The problem is once they select the team the first rounds work perfectly fine but when round 2 starts, they all go back to team 1 and now have to re-pick teams. How do I make it so that after round 1 the players go to their respective teams? I used class selectors, making sure to change the class and team each time, (CLASS 1 = Team 1)(CLASS 2 = Team 2), then I made it so a save point is activated that will save team and class, so why is it not working?