Hi guys, lately over the past couple of weeks this rattle sound has started to occur coming from inside the hatch. Its not the hatch rattle thats fixed by wrapping sticky tape on the hatch latch, it sounds more like a washer loose on a bolt. Its loud when u drive and gets louder when i have the stereo pumping. Does anyone have this sound or knows where to look for it ?? Any help would be appreciated thanks 
Have you checked the actual hatch arm? Maybe it’s time to replace one or both of them. You can get replacements at most auto parts stores and they’re not hard to replace.