I have a on. Brand Roku tv 50 ''I like it quite a bit. I used to love the audio leveling too but anytime I turn it on their will be a crackly static weather I'm playing a dvd on the tv to playing my Xbox even the apps that go with the tv it self
Try unplugging it for a few minutes and plugging it back in. There's some issue that either messes up or completely disables audio in night/leveling mode. Someone on another post suggested this as a fix and it seemed to work for others.