Please tell me, is it normal that when I have the "Sub" option enabled, but as soon as I turn on the equalizer, the output to the subwoofer cuts off (I'm using the RCA line output). After that, I have to go into the app, turn off the equalizer, and then toggle the "Sub" option off and on again. Is this expected behavior? Does it mean I can't use the subwoofer with the equalizer active?