I posted a while ago, but don't think it went through so posting again.
I have a problem since I've updated to IOS 10 on my 6S, and that is that my alarm hasn't always gone off, so I assumed. After doing some tests while fully awake, I note that the alarm is quiet when phone is muted, and when unmuted, it has worked once at normal volume.
However, I had word on another list that others have had issues with the alarm going quiet when VO is turned on, so I shall try leaving VO off until this issue is fixed, so, yes, I smell possible bug here.
Has anyone else had this issue?