Motorola Droid 4 :: It Stops Responding To Bluetooth Commands?

My Droid 4 intermittently stops responding to AVRCP (audio video remote control profile) commands such as play, pause, FF and REW while listening to music through a Bluetooth wireless stereo headset. When I start playing a song, the AVRCP commands work for a while, then the Droid 4 stops responding to them. The headset volume continues to work, but I don't think the phone needs to respond to volume commands because they operate locally at the headset. Here is a list of things I have tried that do NOT solve the problem:Three different music players: factory loaded music player, Power Amp, and DoubleTwist Three different Bluetooth stereo headsets: LG Tone (from Verizon store), Sennheiser MM200, Sony DR-BT100CX Hard reset of the phone Got a new replacement Droid 4 from the Verizon Wireless store "Allow Bluetooth bypass" in the Location & security settings both checked and unchecked.Pin/password/pattern protect both enabled and disabled WiFi turned on and off Screen locked and unlocked.(Toggling between locked and unlocked and vice-versa seems to get it responding to commands, but then wait another minute and it stops responding again.)Installed System Update 6.13.219.en.US on 4/28/12? I listen to a lot of music, so the phone is useless to me if this is not fixed. I'm within Verizon's 14 day return period, so this will be the second Droid 4 I'm returning if the problem is not fixed.