I've noticed that my vampire losses are a bit higher recently, and that often times the mobile app is connecting quickly, indicating the car isn't sleeping at the normal times it used to (i.e. after being parked at work for several hours).
I made sure the display sleep settings were correct, which they were. I had to reboot the center console yesterday to fix volume/muting issue but not sure if that's alleviated the issue thus far.. if not I may try the long-press reboot too... that's a new one to me.
"Long reboot" fixed my sleeping problem...push in both scroll wheels for 40+ seconds.