NooB here but I've been using Poweramp for years. Best Android Player by far IMO. Anyway I got some BOSE SoundSport Bluetooth earbuds for Christmas. They sound amazing BTW. I too am having problems with the headphone buttons working. Poweramp version 2.0.10-build-588-play (full version). My phone is an HTC M8 (AT&T) running Android 6.0 6.20.502.5 HTC Sense 7.0 They work sometimes and sometimes they don't. I've tried everything!!!! Help and thanks!!!!