(Please help me) change level and game mode but cant control player

Hi i create game menu with Menu Builder Carousel from UE market and when I change level my game mode change to UE4 vehicle game mode using overide game mode in world setting.
i have 2 problem

  1. cant control player
  2. my level is load to slow then my car is falling before it loaded

hope someone give some suggestion
thank you in advanced

my first problem is solved now by move the object to a persistent level at the start of game
how ever I cant control my vehicle but it loaded

i solve cant control player

thank everyone