So tried out split screen with a friend and it had all the characters locked for him and he was only able to play by picking random and he got Oscar Mike two times. Is it a thing that the other player can only play by selecting random?
Yes this did happen to me, I was confused too but the solution is for the other person to complete the Prologue on their profile so the initial 7 characters will be unlocked.
Thank you for the answer! Will have to give this another try then.