This seems spot on - we tested it out today.
My phone is linked to the car by bluetooth but not plugged in as my music is on a USB stick and the car only has one data type port. Whenever my wife sent anything from her phone (text messages, emails) the music paused, requiring it to be restarted from the screen - the mute button on the steering wheel didn't work. Unfortunately, the notifications from our home cameras and door bell also trigger the problem.
Maybe they'll fix this in a future release, but even if not, it's good to know what's causing it
Our car is going in next week for it's first service, so I'll mention it as well.