Unreal Engine crushed. (Fortnite: Battle Royale)

This problem appears intermittently...
Play in a fortnight... In the lobby EXCELLENT, download FAST, come to the island spawn and ... The picture on the screen is frozen... Alt+F4 is not working... BUT the conversation with his teammates continues! A moment later,two the game crashes and leaves a window that says Unreal Engine crushed... Screenshot yet, as soon as I can publish, publish. Help!..