Changing the MAX Health of all Players not working?

So with this code in a normal script in StarterCharacterScripts inside StarterPlayer it only changes 1 Players maxhealth. I cant find the reason for that.

game.Players.PlayerAdded:Connect(function(plr)
        plr.CharacterAdded:connect(function(Char) --fires when the character is added, this includes when the player dies aswell
            if Char:FindFirstChild("Humanoid") then
                Char.Humanoid.MaxHealth = 200 --Change max health first
                Char.Humanoid.Health = 200 -- then change the health itself
        print("Health changed for"..plr.Name)
            end
        end)
    end)

EDIT: Its random if a player gets the new maxhealth or not. So sometimes 0 players and sometimes 1 or more