Thanks everyone for the comments and help. First I am not playing back a recording, I am playing the song live. I am a complete keyboard noob so I play a few songs a lot of times. I am using the Flowkey app through my iPad to learn and practice with, so that's the setup. The keyboard is about 4 months old and has sat in the same place in my "music" room since I unpacked it. The button turning on is a random event only happening once in 5-10 times. It happened again yesterday so I stopped and replayed the section a few times but could not replicate the problem. Go figure.