I'v had the system for about 5 years now and LOVE it but have noticed the read speak blue light will start flashing and then eventually go out and I lose the rear speakers. The module was under my couch about 10 feet from the main unit. Sometimes a blanket would fall in front of it or it might get knocked back a little. So I moved it to a side table now about 8 feet from the main unit with clear line of site.
I cleaned both of their fronts to make sure it wasn't blocking anything. Did a renew the ID thing did not fix. It could be a few minutes or hours and I'll just notice the rear speakers have gone out. Turn the system off and then back on recconnects but it's a pain during a movie or show to have to stop everything and do that then back up where I was.