Not really serious an issue, but vexing none the less. Got my Phantom 3 (and controller) now for over a month or so, and last week I noticed the beeps the controller emit when you turn it on/off are all of a sudden sounding very faint. It used to be a very loud experience before. Anybody else have this problem? I really can't fathom why this is happening. The controller's battery is full, the controller never got wet or anything. Just annoys the heck out of me.