Matt,

What kind of phone do you have? The reason I ask is I had more AVRCP problems with my old Galaxy S2 than I do now with my S4. It's generally worse when there are other heavy duty apps running in the background or if one of my kids is playing a game on the phone at the same time. Other than that, AVCRP with the native controls in my Honda OEM head unit works 90% of the time. This also seems to vary by app, e.g. Google Play Music doesn't recognize Pause but Rocket Player does.

FYI, no reply from Honda, yet. Calling them now for an update.