Alarm tone continues after snooze

For the last few weeks I've noticed my Venu 3 alarm tone continues to emit for a few seconds after I press snooze, rather than silencing straight away. 

Is this affecting anyone else too?

Current alarm settings:

  • Set:ON, Time: 6:29am, Repeat: Weekday, Sounds: Tone & vibration, Label: Wake up
  • Set: OFF, Time: 6:36am, Repeat: Weekend, Sounds: Vibration, Label:  None

Venu 3, Software version 10.20