Game crashed but audio is still being played - BO2 Zombies

[Evt-_-Mayhem]

Whenever i am playing TranZit and doing the easter egg, the game usually crashes. It does it within 15 minutes or less and i dont know why.

[B4ushout]

Evt-_-Mayhem The same happens to me any zombies map crashes but the audio and plutonium keep playing in the backround