Nokia Lumia :: Purity In-ear (WH-920) Controls Don't Work?

This appears to be an issue in other Windows Phone forums. The play/pause/skip controls on the WH-920 headphones don't work or work very sporadically when my Lumia 900 is locked and the screen off. When locked with screen on or unlocked with screen on the controls work completely fine.This basically makes the controls on this $100 headphone set useless if my Lumia is in my pocket I ordered a replacement off of Amazon. Same issue, which leads me to believe this is a phone problem.As well, the L-shape extender makes it so that no commands can be sent at all (locked or unlocked) and also the audio is messed up (very soft) unless the middle button on the earphones is held down. This is for both sets of L-shape extenders and both sets of headphones.