Buzzer randomly does not stop buzzing

[rragan]

I'm playing a song on game win using an active piezo buzzer on a Raspberry Pi Pico. Mostly it works fine. Randomly it seems to "freeze" and leave the buzzer on. Power cycling stops the noise.

Code logic is
song = '0 E5 3 14;3 .....'
mySong = music(song, pins=[Pin(15)])
for i in range(len(song)):
mySong.tick()
time.sleep(0.04)
mySong.stop()
buzzer.off()
time.sleep(1.0)
lcd.clear()
lcd.putstr('Press Start')

Any ideas? I added the extra buzzer.off() to further try to shut it down (buzzer is Pin 15) though the stop() call ought to take care of that.