I know, you said, but I don’t buy their response either. I bet it’s something in the way the notification is handled by your OS, making the Blink app think that you have responded to it, so the app is running, whilst the phone is still closed, and the audio is heard, because early notification takes you to the camera, when you select the notification, when behaving normally.
What could possibly be the point of doing that, and activating the camera, when you haven’t even decided if you want to look. Battery killer at its best, which Blink do everything they can to avoid. Sounds to me like the agent in question was doing what many do, and not just at Blink, fob you off with any old bs, so you’ll go away. You could have said, “Oh, interesting, read me your documentation on that feature.” lol. At a pinch, if it was designed to give you fast access audio only, to the camera, it should be documented, and have an option to turn it off, which I’ve never seen. Not to mention, if it really was a feature, it would have happened to me, and many others too, and it has not, only a few.
It’s almost a pity that you’ve solved it by an OS update, because it would have been interesting to see if that stopped it.
Let’s see if sparkinstx can shed any more light on it.