I know this is probably an odd bug mention. I always disable music in any game that I play. Because of this, now I hear this constant low background sound coming from my game. It almost sounds like an ambulance a very long distance away. I didn't notice it at first, until my dogs start reacting to it. Several times I have paused my game to see if it's something IRL. Nope it's from the game. Now that I know it's from the game it's becoming extremely annoying and seems to get louder...once you consciously know it's there.