Are ambient sounds bugged?

Just as the title says: are ambient sounds bugged in Legendary Heroes? 

In vanilla FE, I know ambient sounds, such as birds and rain and whatnot, played somewhat sporadically. Events such as building a city seemed to be their trigger- then, after a few turns, they'd ABRUPTLY shut off. Kind of immersion breaking, playing on a dead silent map. They'd eventually come back, in one form or another, but not for long. I think it's after a battle that they will disappear. 

So yes, just booted up LH (great job on this by the way) and the first thing I listened for where ambient sounds. And from my brief time in game, I think they play as they did in FE i.e. on the buggy side. 

Is this a known problem? Does this happen to others too? Or is this working as intended?