Recently, the wireless subwoofer for my Samsung hw-f550 audio bar keeps disconnecting. I unplug it and plug it back in and it reconnects for an hour or so and then it disconnects again. I haven't been able to identify what might be causing the issue. My tv is a Samsung pn5185000 and the sound bar is connected via soundtrack. I use a Logitech harmony 880 remote. Any idea what might be interfering with the wireless connection?