Mysterious call on hold preempts all music and HVAC

So the myLink annoyances continue, but this one is not so minor. Starting a day or two, every time I start my Volt I first get whatever I was last listening to. But very quickly as my phone connects, the music stops and HVAC level goes way down like I'm receiving a call. And who am I calling, you ask?

Apparently.... me.



And I guess I'm on hold. It seems like they could at least offer me some hold music.

But when you click on my call, it turns out I'm not really on hold:



You can try to end the call, and the count-up time will stop, but nothing else changes. You're still locked out of music and HVAC.

The only way I've found to fix it is to start streaming music from my phone. This "ends the call," and I can then switch to whatever source I want.

Did I mention the car is doing this 100% of the time? Ugh. Anybody else experienced this? I'm using an iPhone 6 with latest software (9.3.2 if memory serves). Volt is a Dec 2016 buid.

Thanks,
Keith