Having a problem with our playbar and sub dropping out when the volume is turned up. This occurs with the sub or without. I've changed the channel on wifi network. It happens when playing Spotify or other music, as well as when watching cable TV or watching movies. Netflix and cable tv are wired, where music is streamed over wifi. Any suggestions? Sometimes I can fix it by switching from TV sound to music streaming (or vice versa) and sometimes not. I'm ready to return the system if this can't be fixed.