A vehicle in the game can't disappear without any interaction. By system design, the only way a vehicle can disappear in our game is if the player has chosen to dismantle it. Many times users do this without realizing it, but it is the only way for a vehicle to disappear. Also remember to check well before entering the battle, on the previous screen, in your hangar what vehicles you have available and choose the desired one to play correctly. This is done on the screen just before entering the game.